diff --git a/ams/server/src/main/java/com/netease/arctic/server/optimizing/plan/MixedIcebergPartitionPlan.java b/ams/server/src/main/java/com/netease/arctic/server/optimizing/plan/MixedIcebergPartitionPlan.java
index 1c2730b47a..5d5f3fda4a 100644
--- a/ams/server/src/main/java/com/netease/arctic/server/optimizing/plan/MixedIcebergPartitionPlan.java
+++ b/ams/server/src/main/java/com/netease/arctic/server/optimizing/plan/MixedIcebergPartitionPlan.java
@@ -155,7 +155,7 @@ public boolean isMinorNecessary() {
       if (keyedTable) {
         int smallFileCount = fragmentFileCount + equalityDeleteFileCount;
         int baseSplitCount = getBaseSplitCount();
-        if (smallFileCount >= Math.max(baseSplitCount, config.getMinorLeastFileCount())) {
+        if (smallFileCount >= Math.max(baseSplitCount + 1, config.getMinorLeastFileCount())) {
           return true;
         } else if ((smallFileCount > baseSplitCount || hasChangeFiles) && reachMinorInterval()) {
           return true;