diff --git a/internal/api/mobile/order_preview/normal_create.go b/internal/api/mobile/order_preview/normal_create.go
index 9aa5aee..09d49b8 100755
--- a/internal/api/mobile/order_preview/normal_create.go
+++ b/internal/api/mobile/order_preview/normal_create.go
@@ -10,7 +10,6 @@ import (
 	"recook/internal/model/promotion"
 	"recook/internal/model/user"
 	"recook/internal/model/vend"
-	"recook/internal/service/baseCode"
 	"recook/internal/v2/lib/jcook"
 	"recook/internal/v2/lib/shama"
 	"recook/internal/v2/model/flashsale"
@@ -65,7 +64,10 @@ func CreatePreviewNormalOrder(c *gin.Context) {
 
 	sharerId := myInfo.ID
 	if p.InvitationNo != "" {
-		sharerId = uint(baseCode.Decode(p.InvitationNo))
+		var shareUser user.Information
+		dbc.DB.First(&shareUser, "invitation_no=?", p.InvitationNo)
+		// sharerId = uint(baseCode.Decode(p.InvitationNo))
+		sharerId = shareUser.ID
 	}
 	if sharerId == 0 {
 		sharerId = myInfo.ID
diff --git a/internal/service/app/register.go b/internal/service/app/register.go
index e56ae7b..83366de 100644
--- a/internal/service/app/register.go
+++ b/internal/service/app/register.go
@@ -36,7 +36,10 @@ func (r *registerUser) UserAdd(c *gin.Context, login *user.Login, info *user.Inf
 		level := 0
 		var parentID uint = 0
 		if info.InvitationNo != "" {
-			uid := baseCode.Decode(info.InvitationNo)
+			var shareUser user.Information
+			// uid := baseCode.Decode(info.InvitationNo)
+			mysql.Db.First(&shareUser, "invitation_no=?", info.InvitationNo)
+			uid := shareUser.ID
 			if uid != 0 {
 				var p user.Information
 				mysql.Db.First(&p, "id = ?", uid)
diff --git a/internal/service/baseCode/baseCode.go b/internal/service/baseCode/baseCode.go
index 5f6ad61..a057963 100644
--- a/internal/service/baseCode/baseCode.go
+++ b/internal/service/baseCode/baseCode.go
@@ -32,6 +32,14 @@ func Encode(uid uint64) string {
 	return res
 }
 
+func ReverseString(str string) string {
+	strArr := []rune(str)
+	for i := 0; i < len(strArr)/2; i++ {
+		strArr[len(strArr)-1-i], strArr[i] = strArr[i], strArr[len(strArr)-1-i]
+	}
+	return string(strArr)
+}
+
 func Decode(code string) uint64 {
 	res := uint64(0)
 	lenCode := len(code)
@@ -41,16 +49,16 @@ func Decode(code string) uint64 {
 		baseRev[v] = k
 	}
 	// 查找补位字符的位置
-	isPad := strings.Index(code, PAD)
+	isPad := strings.Index(ReverseString(code), PAD)
 	if isPad != -1 {
-		lenCode = isPad
+		lenCode = len(code) - 1 - isPad
 	}
 	r := 0
 	for i := 0; i < lenCode; i++ {
 		// 补充字符直接跳过
-		if string(code[i]) == PAD {
-			continue
-		}
+		// if string(code[i]) == PAD {
+		// 	continue
+		// }
 		index, ok := baseRev[code[i]]
 		if !ok {
 			return 0