diff --git a/controller/meter.go b/controller/meter.go
index 6ef5a3e..eb34fcd 100644
--- a/controller/meter.go
+++ b/controller/meter.go
@@ -253,7 +253,7 @@ func unbindAssociatedMeters(c *fiber.Ctx) error {
 	if pass, err := checkParkBelongs(parkId, meterLog, c, &result); !pass {
 		return err
 	}
-	masterMeter := c.Params("master")
+	masterMeter := c.Params("code")
 	slaveMeter := c.Params("slave")
 	if len(masterMeter) == 0 || len(slaveMeter) == 0 {
 		meterLog.Warn("无法解除指定园区下两个表计之间的关联关系，表计编号为空。")