diff --git a/ui/src/views/application/components/ParamSettingDialog.vue b/ui/src/views/application/components/ParamSettingDialog.vue
index 99eccb368..d5db1e41e 100644
--- a/ui/src/views/application/components/ParamSettingDialog.vue
+++ b/ui/src/views/application/components/ParamSettingDialog.vue
@@ -56,7 +56,7 @@
                   <el-input-number
                     v-model="form.similarity"
                     :min="0"
-                    :max="1"
+                    :max="form.search_mode === 'blend' ? 2 : 1"
                     :precision="3"
                     :step="0.1"
                     controls-position="right"
diff --git a/ui/src/views/hit-test/index.vue b/ui/src/views/hit-test/index.vue
index 011806f0e..7cc56a5f3 100644
--- a/ui/src/views/hit-test/index.vue
+++ b/ui/src/views/hit-test/index.vue
@@ -130,7 +130,7 @@
               <el-input-number
                 v-model="cloneForm.similarity"
                 :min="0"
-                :max="1"
+                :max="cloneForm.search_mode === 'blend' ? 2 : 1"
                 :precision="3"
                 :step="0.1"
                 controls-position="right"