diff --git a/backend/core/models/migrationscripts/20260818_add_blueprint_id_index_to_pipelines.go b/backend/core/models/migrationscripts/20260818_add_blueprint_id_index_to_pipelines.go
new file mode 100644
index 00000000000..8b541468a3c
--- /dev/null
+++ b/backend/core/models/migrationscripts/20260818_add_blueprint_id_index_to_pipelines.go
@@ -0,0 +1,46 @@
+/*
+Licensed to the Apache Software Foundation (ASF) under one or more
+contributor license agreements.  See the NOTICE file distributed with
+this work for additional information regarding copyright ownership.
+The ASF licenses this file to You under the Apache License, Version 2.0
+(the "License"); you may not use this file except in compliance with
+the License.  You may obtain a copy of the License at
+
+    http://www.apache.org/licenses/LICENSE-2.0
+
+Unless required by applicable law or agreed to in writing, software
+distributed under the License is distributed on an "AS IS" BASIS,
+WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+See the License for the specific language governing permissions and
+limitations under the License.
+*/
+
+package migrationscripts
+
+import (
+	"github.com/apache/incubator-devlake/core/context"
+	"github.com/apache/incubator-devlake/core/errors"
+	"github.com/apache/incubator-devlake/helpers/migrationhelper"
+)
+
+type addBlueprintIdIndexToPipelines struct{}
+
+type pipeline20260818 struct {
+	BlueprintId uint64 `gorm:"index"`
+}
+
+func (pipeline20260818) TableName() string {
+	return "_devlake_pipelines"
+}
+
+func (u *addBlueprintIdIndexToPipelines) Up(basicRes context.BasicRes) errors.Error {
+	return migrationhelper.AutoMigrateTables(basicRes, &pipeline20260818{})
+}
+
+func (*addBlueprintIdIndexToPipelines) Version() uint64 {
+	return 20260818000001
+}
+
+func (*addBlueprintIdIndexToPipelines) Name() string {
+	return "add blueprint_id index for _devlake_pipelines"
+}
diff --git a/backend/core/models/migrationscripts/register.go b/backend/core/models/migrationscripts/register.go
index 69ab4d673de..22f5f9e6d53 100644
--- a/backend/core/models/migrationscripts/register.go
+++ b/backend/core/models/migrationscripts/register.go
@@ -150,5 +150,6 @@ func All() []plugin.MigrationScript {
 		new(addCqProjectMetricsHistory),
 		new(addIsBotToAccounts),
 		new(addSprintVelocityFields),
+		new(addBlueprintIdIndexToPipelines),
 	}
 }
diff --git a/backend/core/models/pipeline.go b/backend/core/models/pipeline.go
index f9613dd0e06..a3c0dcae7cb 100644
--- a/backend/core/models/pipeline.go
+++ b/backend/core/models/pipeline.go
@@ -54,7 +54,7 @@ func (plan PipelinePlan) IsEmpty() bool {
 type Pipeline struct {
 	common.Model
 	Name          string       `json:"name" gorm:"index"`
-	BlueprintId   uint64       `json:"blueprintId"`
+	BlueprintId   uint64       `json:"blueprintId" gorm:"index"`
 	Plan          PipelinePlan `json:"plan" gorm:"serializer:encdec"`
 	TotalTasks    int          `json:"totalTasks"`
 	FinishedTasks int          `json:"finishedTasks"`