diff --git a/server/feishu-sync/internal/logic/webhooklogic.go b/server/feishu-sync/internal/logic/webhooklogic.go
index 1f596c5f..fc30ea90 100644
--- a/server/feishu-sync/internal/logic/webhooklogic.go
+++ b/server/feishu-sync/internal/logic/webhooklogic.go
@@ -6,7 +6,6 @@ import (
 	"crypto/cipher"
 	"crypto/sha256"
 	"encoding/base64"
-	"encoding/hex"
 	"encoding/json"
 	"errors"
 	"fmt"
@@ -146,12 +145,6 @@ func (l *WebhookLogic) CalculateFeiShuWebhookSignature(timestamp, nonce, encrypt
 
 // 解密事件消息
 func (l *WebhookLogic) DecryptFeiShuWebhookMsg(encrypt string, encryptKey string) ([]byte, error) {
-	h := sha256.New()
-	_, err := h.Write([]byte(encryptKey))
-	if err != nil {
-		return nil, err
-	}
-	key := hex.EncodeToString(h.Sum(nil))
 	buf, err := base64.StdEncoding.DecodeString(encrypt)
 	if err != nil {
 		return nil, fmt.Errorf("base64StdEncode Error[%v]", err)
@@ -159,7 +152,7 @@ func (l *WebhookLogic) DecryptFeiShuWebhookMsg(encrypt string, encryptKey string
 	if len(buf) < aes.BlockSize {
 		return nil, errors.New("cipher  too short")
 	}
-	keyBs := sha256.Sum256([]byte(key))
+	keyBs := sha256.Sum256([]byte(encryptKey))
 	block, err := aes.NewCipher(keyBs[:sha256.Size])
 	if err != nil {
 		return nil, fmt.Errorf("AESNewCipher Error[%v]", err)