diff --git a/apps/application/migrations/0007_alter_application_prologue.py b/apps/application/migrations/0007_alter_application_prologue.py
new file mode 100644
index 00000000000..27b519cf8bb
--- /dev/null
+++ b/apps/application/migrations/0007_alter_application_prologue.py
@@ -0,0 +1,18 @@
+# Generated by Django 4.1.13 on 2024-05-24 11:00
+
+from django.db import migrations, models
+
+
+class Migration(migrations.Migration):
+
+    dependencies = [
+        ('application', '0006_applicationapikey_allow_cross_domain_and_more'),
+    ]
+
+    operations = [
+        migrations.AlterField(
+            model_name='application',
+            name='prologue',
+            field=models.CharField(default='', max_length=4096, verbose_name='开场白'),
+        ),
+    ]
diff --git a/apps/application/models/application.py b/apps/application/models/application.py
index 6c77937bdef..e0fb83e7715 100644
--- a/apps/application/models/application.py
+++ b/apps/application/models/application.py
@@ -34,7 +34,7 @@ class Application(AppModelMixin):
     id = models.UUIDField(primary_key=True, max_length=128, default=uuid.uuid1, editable=False, verbose_name="主键id")
     name = models.CharField(max_length=128, verbose_name="应用名称")
     desc = models.CharField(max_length=512, verbose_name="引用描述", default="")
-    prologue = models.CharField(max_length=1024, verbose_name="开场白", default="")
+    prologue = models.CharField(max_length=4096, verbose_name="开场白", default="")
     dialogue_number = models.IntegerField(default=0, verbose_name="会话数量")
     user = models.ForeignKey(User, on_delete=models.DO_NOTHING)
     model = models.ForeignKey(Model, on_delete=models.SET_NULL, db_constraint=False, blank=True, null=True)
diff --git a/apps/application/serializers/application_serializers.py b/apps/application/serializers/application_serializers.py
index aba6e3f7a72..cc4430f8d74 100644
--- a/apps/application/serializers/application_serializers.py
+++ b/apps/application/serializers/application_serializers.py
@@ -113,7 +113,7 @@ class ApplicationSerializer(serializers.Serializer):
     model_id = serializers.CharField(required=False, allow_null=True, allow_blank=True,
                                      error_messages=ErrMessage.char("模型"))
     multiple_rounds_dialogue = serializers.BooleanField(required=True, error_messages=ErrMessage.char("多轮对话"))
-    prologue = serializers.CharField(required=False, allow_null=True, allow_blank=True, max_length=1024,
+    prologue = serializers.CharField(required=False, allow_null=True, allow_blank=True, max_length=4096,
                                      error_messages=ErrMessage.char("开场白"))
     dataset_id_list = serializers.ListSerializer(required=False, child=serializers.UUIDField(required=True),
                                                  allow_null=True, error_messages=ErrMessage.list("关联知识库"))
@@ -260,7 +260,7 @@ class Edit(serializers.Serializer):
                                          error_messages=ErrMessage.char("模型"))
         multiple_rounds_dialogue = serializers.BooleanField(required=False,
                                                             error_messages=ErrMessage.boolean("多轮会话"))
-        prologue = serializers.CharField(required=False, allow_null=True, allow_blank=True, max_length=1024,
+        prologue = serializers.CharField(required=False, allow_null=True, allow_blank=True, max_length=4096,
                                          error_messages=ErrMessage.char("开场白"))
         dataset_id_list = serializers.ListSerializer(required=False, child=serializers.UUIDField(required=True),
                                                      error_messages=ErrMessage.list("关联知识库")