diff --git a/src/actions/providers.ts b/src/actions/providers.ts
index 4a8fb9788..dba2b7909 100644
--- a/src/actions/providers.ts
+++ b/src/actions/providers.ts
@@ -4,6 +4,7 @@ import { revalidatePath } from "next/cache";
 import { GeminiAuth } from "@/app/v1/_lib/gemini/auth";
 import { isClientAbortError } from "@/app/v1/_lib/proxy/errors";
 import { getSession } from "@/lib/auth";
+import { publishProviderCacheInvalidation } from "@/lib/cache/provider-cache";
 import {
   clearConfigCache,
   clearProviderState,
@@ -36,6 +37,7 @@ import {
   createProvider,
   deleteProvider,
   findAllProviders,
+  findAllProvidersFresh,
   findProviderById,
   getProviderStatistics,
   resetProviderTotalCostResetAt,
@@ -102,6 +104,29 @@ const API_TEST_CONFIG = {
 const PROXY_RETRY_STATUS_CODES = new Set([502, 504, 520, 521, 522, 523, 524, 525, 526, 527, 530]);
 const CLOUDFLARE_ERROR_STATUS_CODES = new Set([520, 521, 522, 523, 524, 525, 526, 527, 530]);
 
+/**
+ * 广播 Provider 缓存失效通知（跨实例）
+ *
+ * CRUD 操作后调用，通知所有实例清除缓存。
+ * 失败时不影响主流程，其他实例将依赖 TTL 过期后刷新。
+ */
+async function broadcastProviderCacheInvalidation(context: {
+  operation: "add" | "edit" | "remove";
+  providerId: number;
+}): Promise<void> {
+  try {
+    await publishProviderCacheInvalidation();
+    logger.debug(`${context.operation} Provider:cache_invalidation_success`, {
+      providerId: context.providerId,
+    });
+  } catch (error) {
+    logger.warn(`${context.operation} Provider:cache_invalidation_failed`, {
+      providerId: context.providerId,
+      error: error instanceof Error ? error.message : String(error),
+    });
+  }
+}
+
 // 获取服务商数据
 export async function getProviders(): Promise<ProviderDisplay[]> {
   try {
@@ -121,7 +146,7 @@ export async function getProviders(): Promise<ProviderDisplay[]> {
 
     // 并行获取供应商列表和统计数据
     const [providers, statistics] = await Promise.all([
-      findAllProviders(),
+      findAllProvidersFresh(),
       getProviderStatistics().catch((error) => {
         logger.trace("getProviders:statistics_error", {
           message: error.message,
@@ -309,7 +334,7 @@ export async function getProviderGroupsWithCount(): Promise<
   ActionResult<Array<{ group: string; providerCount: number }>>
 > {
   try {
-    const providers = await findAllProviders();
+    const providers = await findAllProvidersFresh();
     const groupCounts = new Map<string, number>();
 
     for (const provider of providers) {
@@ -495,6 +520,9 @@ export async function addProvider(data: {
       // 不影响主流程，仅记录警告
     }
 
+    // 广播缓存更新（跨实例即时生效）
+    await broadcastProviderCacheInvalidation({ operation: "add", providerId: provider.id });
+
     revalidatePath("/settings/providers");
     logger.trace("addProvider:revalidated", { path: "/settings/providers" });
 
@@ -633,6 +661,9 @@ export async function editProvider(
       }
     }
 
+    // 广播缓存更新（跨实例即时生效）
+    await broadcastProviderCacheInvalidation({ operation: "edit", providerId });
+
     revalidatePath("/settings/providers");
     return { ok: true };
   } catch (error) {
@@ -667,6 +698,9 @@ export async function removeProvider(providerId: number): Promise<ActionResult>
       });
     }
 
+    // 广播缓存更新（跨实例即时生效）
+    await broadcastProviderCacheInvalidation({ operation: "remove", providerId });
+
     revalidatePath("/settings/providers");
     return { ok: true };
   } catch (error) {
@@ -687,7 +721,7 @@ export async function getProvidersHealthStatus() {
       return {};
     }
 
-    const providerIds = await findAllProviders().then((providers) => providers.map((p) => p.id));
+    const providerIds = await findAllProvidersFresh().then((providers) => providers.map((p) => p.id));
     const healthStatus = await getAllHealthStatusAsync(providerIds, {
       forceRefresh: true,
     });
diff --git a/src/app/v1/_lib/proxy/provider-selector.ts b/src/app/v1/_lib/proxy/provider-selector.ts
index 5e991093a..527d6e090 100644
--- a/src/app/v1/_lib/proxy/provider-selector.ts
+++ b/src/app/v1/_lib/proxy/provider-selector.ts
@@ -645,7 +645,11 @@ export class ProxyProviderResolver {
     provider: Provider | null;
     context: NonNullable<ProviderChainItem["decisionContext"]>;
   }> {
-    const allProviders = await findAllProviders();
+    // 使用 Session 快照保证故障迁移期间数据一致性
+    // 如果没有 session，回退到 findAllProviders（内部已使用缓存）
+    const allProviders = session
+      ? await session.getProvidersSnapshot()
+      : await findAllProviders();
     const requestedModel = session?.getCurrentModel() || "";
 
     // === Step 1: 分组预过滤（静默，用户只能看到自己分组内的供应商）===
diff --git a/src/app/v1/_lib/proxy/session.ts b/src/app/v1/_lib/proxy/session.ts
index 8cea4cb25..85a3619a6 100644
--- a/src/app/v1/_lib/proxy/session.ts
+++ b/src/app/v1/_lib/proxy/session.ts
@@ -3,6 +3,7 @@ import type { Context } from "hono";
 import { logger } from "@/lib/logger";
 import { clientRequestsContext1m as clientRequestsContext1mHelper } from "@/lib/special-attributes";
 import { findLatestPriceByModel } from "@/repository/model-price";
+import { findAllProviders } from "@/repository/provider";
 import type { CacheTtlResolved } from "@/types/cache";
 import type { Key } from "@/types/key";
 import type { ProviderChainItem } from "@/types/message";
@@ -108,6 +109,14 @@ export class ProxySession {
   // Cached price data for billing model source (lazy loaded: undefined=not loaded, null=no data)
   private cachedBillingPriceData?: ModelPriceData | null;
 
+  /**
+   * 请求级 Provider 快照
+   *
+   * 在 Session 首次获取时冻结，整个请求生命周期保持不变。
+   * 用于保证故障迁移期间数据一致性（避免同一请求多次调用返回不同结果）。
+   */
+  private providersSnapshot: Provider[] | null = null;
+
   private constructor(init: {
     startTime: number;
     method: string;
@@ -313,6 +322,23 @@ export class ProxySession {
     return this.requestSequence;
   }
 
+  /**
+   * 获取 Provider 列表快照
+   *
+   * 首次调用时从进程缓存获取并冻结，后续调用返回相同数据。
+   * 用于保证故障迁移期间数据一致性（避免同一请求多次调用返回不同结果）。
+   *
+   * @returns Provider 列表（整个请求生命周期不变）
+   */
+  async getProvidersSnapshot(): Promise<Provider[]> {
+    if (this.providersSnapshot !== null) {
+      return this.providersSnapshot;
+    }
+
+    this.providersSnapshot = await findAllProviders();
+    return this.providersSnapshot;
+  }
+
   /**
    * 生成基于请求指纹的确定性 Session ID
    *
diff --git a/src/lib/cache/provider-cache.ts b/src/lib/cache/provider-cache.ts
new file mode 100644
index 000000000..b9a5cf133
--- /dev/null
+++ b/src/lib/cache/provider-cache.ts
@@ -0,0 +1,172 @@
+/**
+ * Provider 进程级缓存
+ *
+ * 特性：
+ * - 30s TTL 自动过期
+ * - Redis Pub/Sub 失效通知（跨实例即时同步）
+ * - 降级策略：Redis 不可用时依赖 TTL 自动过期
+ * - 版本号防止并发刷新竞态
+ * - 请求级快照支持（保证故障迁移期间数据一致性）
+ */
+
+import "server-only";
+
+import { logger } from "@/lib/logger";
+import {
+  publishCacheInvalidation,
+  subscribeCacheInvalidation,
+} from "@/lib/redis/pubsub";
+import type { Provider } from "@/types/provider";
+
+export const CHANNEL_PROVIDERS_UPDATED = "cch:cache:providers:updated";
+
+const CACHE_TTL_MS = 30_000; // 30 seconds
+
+interface ProviderCacheState {
+  data: Provider[] | null;
+  expiresAt: number;
+  version: number; // 防止并发刷新竞态
+  refreshPromise: Promise<Provider[]> | null; // 防止并发请求同时刷新
+}
+
+const cache: ProviderCacheState = {
+  data: null,
+  expiresAt: 0,
+  version: 0,
+  refreshPromise: null,
+};
+
+let subscriptionInitialized = false;
+
+/**
+ * 初始化 Redis 订阅
+ *
+ * 使用失效通知模式：收到通知后清除本地缓存，下次请求时从 DB 刷新
+ * pubsub.ts 订阅：静默降级
+ */
+async function ensureSubscription(): Promise<void> {
+  if (subscriptionInitialized) return;
+
+  // CI/build 阶段跳过
+  if (process.env.CI === "true" || process.env.NEXT_PHASE === "phase-production-build") {
+    subscriptionInitialized = true;
+    return;
+  }
+
+  subscriptionInitialized = true;
+  // pubsub.ts 订阅机制
+  await subscribeCacheInvalidation(CHANNEL_PROVIDERS_UPDATED, () => {
+    invalidateCache();
+    logger.debug("[ProviderCache] Cache invalidated via pub/sub");
+  });
+}
+
+/**
+ * 失效缓存（本地）
+ */
+export function invalidateCache(): void {
+  cache.data = null;
+  cache.expiresAt = 0;
+  cache.version++;
+  cache.refreshPromise = null;
+}
+
+/**
+ * 发布缓存失效通知（跨实例）
+ *
+ * CRUD 操作后调用，通知所有实例清除缓存。
+ * 各实例在下次请求时自行从 DB 刷新，保证：
+ * - 类型安全：Date 等类型从 DB 正确构造
+ * - 数据安全：不通过 Redis 传输敏感数据（如 provider.key）
+ */
+export async function publishProviderCacheInvalidation(): Promise<void> {
+  invalidateCache();
+  await publishCacheInvalidation(CHANNEL_PROVIDERS_UPDATED);
+  logger.debug("[ProviderCache] Published cache invalidation");
+}
+
+/**
+ * 获取缓存的 Provider 列表（带自动刷新）
+ *
+ * @param fetcher - 数据库查询函数（依赖注入，便于测试）
+ * @returns Provider 列表
+ */
+export async function getCachedProviders(
+  fetcher: () => Promise<Provider[]>
+): Promise<Provider[]> {
+  // 确保订阅已初始化（异步，不阻塞）
+  void ensureSubscription();
+
+  const now = Date.now();
+
+  // 1. 缓存命中且未过期
+  if (cache.data && cache.expiresAt > now) {
+    return cache.data;
+  }
+
+  // 2. 已有刷新任务在进行中，等待它完成（防止并发刷新）
+  if (cache.refreshPromise) {
+    return cache.refreshPromise;
+  }
+
+  // 3. 需要刷新，创建新的刷新任务
+  const currentVersion = cache.version;
+  cache.refreshPromise = (async () => {
+    try {
+      const data = await fetcher();
+
+      // 检查版本号，防止被更新的失效事件覆盖
+      if (cache.version === currentVersion) {
+        cache.data = data;
+        cache.expiresAt = Date.now() + CACHE_TTL_MS;
+        logger.debug("[ProviderCache] Cache refreshed from DB", {
+          count: data.length,
+          ttlMs: CACHE_TTL_MS,
+        });
+      }
+
+      return data;
+    } finally {
+      // 清除 refreshPromise（允许下次刷新）
+      if (cache.version === currentVersion) {
+        cache.refreshPromise = null;
+      }
+    }
+  })();
+
+  return cache.refreshPromise;
+}
+
+/**
+ * 预热缓存（启动时调用）
+ */
+export async function warmupProviderCache(
+  fetcher: () => Promise<Provider[]>
+): Promise<void> {
+  try {
+    await getCachedProviders(fetcher);
+    logger.info("[ProviderCache] Cache warmed up successfully");
+  } catch (error) {
+    logger.warn("[ProviderCache] Cache warmup failed", { error });
+  }
+}
+
+/**
+ * 获取缓存统计信息（用于监控/调试）
+ */
+export function getProviderCacheStats(): {
+  hasData: boolean;
+  count: number;
+  expiresIn: number;
+  version: number;
+  isRefreshing: boolean;
+} {
+  const now = Date.now();
+  return {
+    hasData: cache.data !== null,
+    count: cache.data?.length ?? 0,
+    expiresIn: Math.max(0, cache.expiresAt - now),
+    version: cache.version,
+    isRefreshing: cache.refreshPromise !== null,
+  };
+}
diff --git a/src/repository/provider.ts b/src/repository/provider.ts
index fd7b6b4c7..4e1eed68d 100644
--- a/src/repository/provider.ts
+++ b/src/repository/provider.ts
@@ -3,6 +3,7 @@
 import { and, desc, eq, isNotNull, isNull, ne, sql } from "drizzle-orm";
 import { db } from "@/drizzle/db";
 import { providers } from "@/drizzle/schema";
+import { getCachedProviders } from "@/lib/cache/provider-cache";
 import { getEnvConfig } from "@/lib/config";
 import { logger } from "@/lib/logger";
 import type { CreateProviderData, Provider, UpdateProviderData } from "@/types/provider";
@@ -191,10 +192,13 @@ export async function findProviderList(
 }
 
 /**
- * Fetch all providers without pagination limits.
- * Use this when you need the complete provider list (e.g., for selection, health status).
+ * 直接从数据库获取所有供应商（绕过缓存）
+ *
+ * 用于：
+ * - 管理后台需要保证数据新鲜度的场景
+ * - 缓存刷新时的数据源
  */
-export async function findAllProviders(): Promise<Provider[]> {
+export async function findAllProvidersFresh(): Promise<Provider[]> {
   const result = await db
     .select({
       id: providers.id,
@@ -252,7 +256,7 @@ export async function findAllProviders(): Promise<Provider[]> {
     .where(isNull(providers.deletedAt))
     .orderBy(desc(providers.createdAt));
 
-  logger.trace("findAllProviders:query_result", {
+  logger.trace("findAllProvidersFresh:query_result", {
     count: result.length,
     ids: result.map((r) => r.id),
   });
@@ -260,6 +264,19 @@ export async function findAllProviders(): Promise<Provider[]> {
   return result.map(toProvider);
 }
 
+/**
+ * 获取所有供应商（带缓存）
+ *
+ * 使用进程级缓存：
+ * - 30s TTL 自动过期
+ * - Redis Pub/Sub 跨实例即时失效
+ *
+ * 用于高频读取场景（如供应商选择）
+ */
+export async function findAllProviders(): Promise<Provider[]> {
+  return getCachedProviders(findAllProvidersFresh);
+}
+
 export async function findProviderById(id: number): Promise<Provider | null> {
   const [provider] = await db
     .select({