diff --git a/charts/tidb-cluster/templates/discovery-deployment.yaml b/charts/tidb-cluster/templates/discovery-deployment.yaml
index 38e21e41b0..df6bd7c507 100644
--- a/charts/tidb-cluster/templates/discovery-deployment.yaml
+++ b/charts/tidb-cluster/templates/discovery-deployment.yaml
@@ -29,6 +29,14 @@ spec:
     {{- if .Values.rbac.create }}
       serviceAccount: {{ template "cluster.name" . }}-discovery
     {{- end }}
+    {{- if .Values.affinity }}
+      affinity:
+{{ toYaml .Values.affinity | indent 8 }}
+    {{- end }}
+    {{- if .Values.tolerations }}
+      tolerations:
+{{ toYaml .Values.tolerations | indent 8 }}
+    {{- end }}
   {{- end }}
       containers:
       - name: discovery
diff --git a/charts/tidb-cluster/values.yaml b/charts/tidb-cluster/values.yaml
index 5b9646e0d0..2959c67ab9 100644
--- a/charts/tidb-cluster/values.yaml
+++ b/charts/tidb-cluster/values.yaml
@@ -48,6 +48,15 @@ discovery:
       cpu: 80m
       memory: 50Mi
 
+  ## affinity defines discovery scheduling rules,it's default settings is empty.
+  ## please read the affinity document before set your scheduling rule:
+  ## ref: https://kubernetes.io/docs/concepts/configuration/assign-pod-node/#affinity-and-anti-affinity
+  affinity: {}
+
+  ## Tolerations are applied to pods, and allow pods to schedule onto nodes with matching taints.
+  ## refer to https://kubernetes.io/docs/concepts/configuration/taint-and-toleration
+  tolerations: []
+
 # Whether enable ConfigMap Rollout management.
 # When enabling, change of ConfigMap will trigger a graceful rolling-update of the component.
 # This feature is only available in tidb-operator v1.0 or higher.