diff --git a/impl/index/arithprogression/arithprogression_common_impl.h b/impl/index/arithprogression/arithprogression_common_impl.h
index 27ca2c84ce1d57d93b58abb9c6f0eb8ec188af79..1c0bc44a7ce2ab16098544f203d31ceaeb4ec09d 100644
--- a/impl/index/arithprogression/arithprogression_common_impl.h
+++ b/impl/index/arithprogression/arithprogression_common_impl.h
@@ -60,9 +60,6 @@ __aicore__ inline void ArithProgressionImpl(const LocalTensor<T> &dstLocal, cons
 
     constexpr int32_t BLOCK_NUM = (ONE_BLK_SIZE / sizeof(T));
     constexpr int32_t REPEAT_NUM = (ONE_REPEAT_BYTE_SIZE / sizeof(T));
-    auto eventIdVToS = GetTPipePtr()->FetchEventID(HardEvent::V_S);
-    SetFlag<HardEvent::V_S>(eventIdVToS);
-    WaitFlag<HardEvent::V_S>(eventIdVToS);
     if (count > BLOCK_NUM) {
         // Generates a basic arithmetic sequence of the BLOCK_NUM length for filling in subsequent arithmetic sequences.
         GetBaseArithProgression<T>(dstLocal, firstValue, diffValue, BLOCK_NUM);
@@ -114,6 +111,9 @@ __aicore__ inline void ArithProgressionImpl(const LocalTensor<T> &dstLocal, cons
         }
     } else {
         // When the length is less than BLOCK_NUM, the arithmetic sequence is generated directly by using a scalar.
+        auto eventIdVToS = GetTPipePtr()->FetchEventID(HardEvent::V_S);
+        SetFlag<HardEvent::V_S>(eventIdVToS);
+        WaitFlag<HardEvent::V_S>(eventIdVToS);
         GetBaseArithProgression<T>(dstLocal, firstValue, diffValue, count);
         auto eventIdSToV = GetTPipePtr()->FetchEventID(HardEvent::S_V);
         SetFlag<HardEvent::S_V>(eventIdSToV);