diff --git a/apis/apps/v1alpha1/collaset_types.go b/apis/apps/v1alpha1/collaset_types.go
index efbf9e14..1e2d33ed 100644
--- a/apis/apps/v1alpha1/collaset_types.go
+++ b/apis/apps/v1alpha1/collaset_types.go
@@ -162,7 +162,7 @@ type PersistentVolumeClaimRetentionPolicy struct {
 }
 
 type ByPartition struct {
-	// Partition controls the update progress by indicating how many pods should be updated.
+	// Partition controls the number of pods in old revisions.
 	// Defaults to nil (all pods will be updated)
 	// +optional
 	Partition *int32 `json:"partition,omitempty"`
diff --git a/config/crd/bases/apps.kusionstack.io_collasets.yaml b/config/crd/bases/apps.kusionstack.io_collasets.yaml
index ef973d1a..66546a96 100644
--- a/config/crd/bases/apps.kusionstack.io_collasets.yaml
+++ b/config/crd/bases/apps.kusionstack.io_collasets.yaml
@@ -227,9 +227,8 @@ spec:
                           controlled by partition value.
                         properties:
                           partition:
-                            description: Partition controls the update progress by
-                              indicating how many pods should be updated. Defaults
-                              to nil (all pods will be updated)
+                            description: Partition controls the number of pods in
+                              old revisions. Defaults to nil (all pods will be updated)
                             format: int32
                             type: integer
                         type: object