diff --git a/pkg/util/aws/eip.go b/pkg/util/aws/eip.go
index ac81461d5d..7e41d8ee9f 100644
--- a/pkg/util/aws/eip.go
+++ b/pkg/util/aws/eip.go
@@ -1,6 +1,7 @@
 package aws
 
 import (
+	"fmt"
 	"github.com/aws/aws-sdk-go/service/ec2"
 	"yunion.io/x/jsonutils"
 	"yunion.io/x/log"
@@ -221,6 +222,10 @@ func (self *SRegion) DissociateEip(eipId string, instanceId string) error {
 		return nil
 	}
 
+	if eip.InstanceId != instanceId {
+		return fmt.Errorf("eip %s associate with another instance %s", eipId, eip.InstanceId)
+	}
+
 	params := &ec2.DisassociateAddressInput{}
 	params.SetAssociationId(eip.AssociationId)
 	_, err = self.ec2Client.DisassociateAddress(params)