diff --git a/api/v1alpha1/alluxioruntime_types.go b/api/v1alpha1/alluxioruntime_types.go
index 58b1d5b2645..0d9b05e6038 100644
--- a/api/v1alpha1/alluxioruntime_types.go
+++ b/api/v1alpha1/alluxioruntime_types.go
@@ -141,7 +141,7 @@ type Level struct {
 	// then we get 100GiB cache storage under "/mnt/cache1" and 50GiB under "/mnt/cache2".
 	// Also note that num of quotas must be consistent with the num of paths defined in Path.
 	// +optional
-	// +kubebuilder:validation:Pattern:="^((\+|-)?(([0-9]+(\.[0-9]*)?)|(\.[0-9]+))(([KMGTPE]i)|[numkMGTPE]|([eE](\+|-)?(([0-9]+(\.[0-9]*)?)|(\.[0-9]+)))),)+((\+|-)?(([0-9]+(\.[0-9]*)?)|(\.[0-9]+))(([KMGTPE]i)|[numkMGTPE]|([eE](\+|-)?(([0-9]+(\.[0-9]*)?)|(\.[0-9]+))))?)$"
+	// +kubebuilder:validation:Pattern:="^((\\+|-)?(([0-9]+(\\.[0-9]*)?)|(\\.[0-9]+))(([KMGTPE]i)|[numkMGTPE]|([eE](\\+|-)?(([0-9]+(\\.[0-9]*)?)|(\\.[0-9]+)))),)+((\\+|-)?(([0-9]+(\\.[0-9]*)?)|(\\.[0-9]+))(([KMGTPE]i)|[numkMGTPE]|([eE](\\+|-)?(([0-9]+(\\.[0-9]*)?)|(\\.[0-9]+))))?)$"
 	QuotaList string `json:"quotaList,omitempty"`
 
 	// StorageType common.CacheStoreType `json:"storageType,omitempty"`
diff --git a/config/crd/bases/data.fluid.io_alluxioruntimes.yaml b/config/crd/bases/data.fluid.io_alluxioruntimes.yaml
index dfc0450846c..7c0f35c95a0 100644
--- a/config/crd/bases/data.fluid.io_alluxioruntimes.yaml
+++ b/config/crd/bases/data.fluid.io_alluxioruntimes.yaml
@@ -522,7 +522,7 @@ spec:
                           storage under "/mnt/cache1" and 50GiB under "/mnt/cache2".
                           Also note that num of quotas must be consistent with the
                           num of paths defined in Path.
-                        pattern: ^(\+|-)?(([0-9]+(\.[0-9]*)?)|(\.[0-9]+))(([KMGTPE]i)|[numkMGTPE]|([eE](\+|-)?(([0-9]+(\.[0-9]*)?)|(\.[0-9]+))))?,((\+|-)?(([0-9]+(\.[0-9]*)?)|(\.[0-9]+))(([KMGTPE]i)|[numkMGTPE]|([eE](\+|-)?(([0-9]+(\.[0-9]*)?)|(\.[0-9]+))))?)+$
+                        pattern: ^((\+|-)?(([0-9]+(\.[0-9]*)?)|(\.[0-9]+))(([KMGTPE]i)|[numkMGTPE]|([eE](\+|-)?(([0-9]+(\.[0-9]*)?)|(\.[0-9]+)))),)+((\+|-)?(([0-9]+(\.[0-9]*)?)|(\.[0-9]+))(([KMGTPE]i)|[numkMGTPE]|([eE](\+|-)?(([0-9]+(\.[0-9]*)?)|(\.[0-9]+))))?)$
                         type: string
                     required:
                     - mediumtype