diff --git a/README.md b/README.md
index 4591214..e7f40c6 100644
--- a/README.md
+++ b/README.md
@@ -143,6 +143,7 @@ The following API endpoints have been implemented
 - [`/v5/order/amend` Amend Order](https://bybit-exchange.github.io/docs/v5/order/amend-order)
 - [`/v5/order/cancel` Cancel Order](https://bybit-exchange.github.io/docs/v5/order/cancel-order)
 - [`/v5/order/realtime` Get Open Orders](https://bybit-exchange.github.io/docs/v5/order/open-order)
+- [`/v5/order/cancel-all` Cancel All Orders](https://bybit-exchange.github.io/docs/v5/order/cancel-all)
 
 #### Account
 
diff --git a/integrationtest/v5/order/order_test.go b/integrationtest/v5/order/order_test.go
index b04a0ed..fb4b70b 100644
--- a/integrationtest/v5/order/order_test.go
+++ b/integrationtest/v5/order/order_test.go
@@ -150,3 +150,31 @@ func TestGetOpenOrders(t *testing.T) {
 		require.NoError(t, err)
 	}
 }
+
+func TestCancelAllOrders(t *testing.T) {
+	client := bybit.NewTestClient().WithAuthFromEnv()
+	category := bybit.CategoryV5Spot
+	symbol := bybit.SymbolV5BTCUSDT
+	{
+		price := "10000.0"
+		_, err := client.V5().Order().CreateOrder(bybit.V5CreateOrderParam{
+			Category:  category,
+			Symbol:    symbol,
+			Side:      bybit.SideBuy,
+			OrderType: bybit.OrderTypeLimit,
+			Qty:       "0.01",
+			Price:     &price,
+		})
+		require.NoError(t, err)
+	}
+
+	res, err := client.V5().Order().CancelAllOrders(bybit.V5CancelAllOrdersParam{
+		Category: category,
+	})
+	require.NoError(t, err)
+	{
+		goldenFilename := "./testdata/v5-cancel-all-orders.json"
+		testhelper.Compare(t, goldenFilename, testhelper.ConvertToJSON(res.Result))
+		testhelper.UpdateFile(t, goldenFilename, testhelper.ConvertToJSON(res.Result))
+	}
+}
diff --git a/integrationtest/v5/order/testdata/v5-cancel-all-orders.json b/integrationtest/v5/order/testdata/v5-cancel-all-orders.json
new file mode 100644
index 0000000..4a24f7d
--- /dev/null
+++ b/integrationtest/v5/order/testdata/v5-cancel-all-orders.json
@@ -0,0 +1,11 @@
+{
+  "LinearInverseOption": {
+    "list": {
+      "orderId": "",
+      "orderLinkId": ""
+    }
+  },
+  "Spot": {
+    "success": "1"
+  }
+}
\ No newline at end of file
diff --git a/v5_order_service.go b/v5_order_service.go
index d541f83..2b2e9e6 100644
--- a/v5_order_service.go
+++ b/v5_order_service.go
@@ -13,6 +13,7 @@ type V5OrderServiceI interface {
 	AmendOrder(V5AmendOrderParam) (*V5AmendOrderResponse, error)
 	CancelOrder(V5CancelOrderParam) (*V5CancelOrderResponse, error)
 	GetOpenOrders(V5GetOpenOrdersParam) (*V5GetOpenOrdersResponse, error)
+	CancelAllOrders(V5CancelAllOrdersParam) (*V5CancelAllOrdersResponse, error)
 }
 
 // V5OrderService :
@@ -260,3 +261,82 @@ func (s *V5OrderService) GetOpenOrders(param V5GetOpenOrdersParam) (*V5GetOpenOr
 
 	return &res, nil
 }
+
+// V5CancelAllOrdersParam :
+// If you pass multiple of these params, the system will process one of param, which priority is symbol > baseCoin > settleCoin.
+type V5CancelAllOrdersParam struct {
+	Category CategoryV5 `json:"category"`
+
+	Symbol      *SymbolV5    `json:"symbol,omitempty"`
+	BaseCoin    *Coin        `json:"baseCoin,omitempty"`
+	SettleCoin  *Coin        `json:"settleCoin,omitempty"`
+	OrderFilter *OrderFilter `json:"orderFilter,omitempty"` // If not passed, Order by default
+}
+
+func (p V5CancelAllOrdersParam) validate() error {
+	if p.Category == CategoryV5Linear || p.Category == CategoryV5Inverse {
+		if p.Symbol == nil && p.BaseCoin == nil && p.SettleCoin == nil {
+			return fmt.Errorf("symbol or baseCoin or settleCoin is needed for linear and inverse")
+		}
+	}
+	if p.Category != CategoryV5Spot && p.OrderFilter != nil {
+		return fmt.Errorf("orderFilter is for spot only")
+	}
+	return nil
+}
+
+// V5CancelAllOrdersResponse :
+type V5CancelAllOrdersResponse struct {
+	CommonV5Response `json:",inline"`
+	Result           V5CancelAllOrdersResult `json:"result"`
+}
+
+// V5CancelAllOrdersResult :
+type V5CancelAllOrdersResult struct {
+	LinearInverseOption *V5CancelAllOrdersLinearInverseOptionResult
+	Spot                *V5CancelAllOrdersSpotResult
+}
+
+// UnmarshalJSON :
+func (r *V5CancelAllOrdersResult) UnmarshalJSON(data []byte) error {
+	if err := json.Unmarshal(data, &r.LinearInverseOption); err != nil {
+		return err
+	}
+	if err := json.Unmarshal(data, &r.Spot); err != nil {
+		return err
+	}
+	return nil
+}
+
+// V5CancelAllOrdersLinearInverseOptionResult :
+type V5CancelAllOrdersLinearInverseOptionResult struct {
+	List []struct {
+		OrderID     string `json:"orderId"`
+		OrderLinkID string `json:"orderLinkId"`
+	} `json:"list"`
+}
+
+// V5CancelAllOrdersSpotResult :
+type V5CancelAllOrdersSpotResult struct {
+	Success string `json:"success"` // 1: success, 0: fail
+}
+
+// CancelAllOrders :
+func (s *V5OrderService) CancelAllOrders(param V5CancelAllOrdersParam) (*V5CancelAllOrdersResponse, error) {
+	var res V5CancelAllOrdersResponse
+
+	if err := param.validate(); err != nil {
+		return nil, fmt.Errorf("validate param: %w", err)
+	}
+
+	body, err := json.Marshal(param)
+	if err != nil {
+		return &res, fmt.Errorf("json marshal: %w", err)
+	}
+
+	if err := s.client.postV5JSON("/v5/order/cancel-all", body, &res); err != nil {
+		return &res, err
+	}
+
+	return &res, nil
+}
diff --git a/v5_order_service_test.go b/v5_order_service_test.go
index 6647bdf..1958e1e 100644
--- a/v5_order_service_test.go
+++ b/v5_order_service_test.go
@@ -369,3 +369,106 @@ func TestV5Order_GetOpenOrders(t *testing.T) {
 		assert.Error(t, err)
 	})
 }
+
+func TestV5Order_CancelAllOrders(t *testing.T) {
+	t.Run("success", func(t *testing.T) {
+		t.Run("linear", func(t *testing.T) {
+			symbol := SymbolV5BTCUSDT
+			param := V5CancelAllOrdersParam{
+				Category: CategoryV5Linear,
+				Symbol:   &symbol,
+			}
+
+			path := "/v5/order/cancel-all"
+			method := http.MethodPost
+			status := http.StatusOK
+			respBody := map[string]interface{}{
+				"result": map[string]interface{}{
+					"list": []map[string]interface{}{
+						{
+							"orderId":     "f6a73e1f-39b5-4dee-af21-1460b2e3b27c",
+							"orderLinkId": "a001",
+						},
+					},
+				},
+			}
+			bytesBody, err := json.Marshal(respBody)
+			require.NoError(t, err)
+
+			server, teardown := testhelper.NewServer(
+				testhelper.WithHandlerOption(path, method, status, bytesBody),
+			)
+			defer teardown()
+
+			client := NewTestClient().
+				WithBaseURL(server.URL).
+				WithAuth("test", "test")
+
+			resp, err := client.V5().Order().CancelAllOrders(param)
+			require.NoError(t, err)
+
+			require.NotNil(t, resp)
+			testhelper.Compare(t, respBody["result"], resp.Result.LinearInverseOption)
+		})
+		t.Run("spot", func(t *testing.T) {
+			param := V5CancelAllOrdersParam{
+				Category: CategoryV5Spot,
+			}
+
+			path := "/v5/order/cancel-all"
+			method := http.MethodPost
+			status := http.StatusOK
+			respBody := map[string]interface{}{
+				"result": map[string]interface{}{
+					"success": "1",
+				},
+			}
+			bytesBody, err := json.Marshal(respBody)
+			require.NoError(t, err)
+
+			server, teardown := testhelper.NewServer(
+				testhelper.WithHandlerOption(path, method, status, bytesBody),
+			)
+			defer teardown()
+
+			client := NewTestClient().
+				WithBaseURL(server.URL).
+				WithAuth("test", "test")
+
+			resp, err := client.V5().Order().CancelAllOrders(param)
+			require.NoError(t, err)
+
+			require.NotNil(t, resp)
+			testhelper.Compare(t, respBody["result"], resp.Result.Spot)
+		})
+	})
+	t.Run("authentication required", func(t *testing.T) {
+		symbol := SymbolV5BTCUSDT
+		param := V5CancelAllOrdersParam{
+			Category: CategoryV5Spot,
+			Symbol:   &symbol,
+		}
+
+		path := "/v5/order/cancel-all"
+		method := http.MethodPost
+		status := http.StatusOK
+		respBody := map[string]interface{}{
+			"result": map[string]interface{}{
+				"success": "1",
+			},
+		}
+		bytesBody, err := json.Marshal(respBody)
+		require.NoError(t, err)
+
+		server, teardown := testhelper.NewServer(
+			testhelper.WithHandlerOption(path, method, status, bytesBody),
+		)
+		defer teardown()
+
+		client := NewTestClient().
+			WithBaseURL(server.URL)
+
+		_, err = client.V5().Order().CancelAllOrders(param)
+		assert.Error(t, err)
+	})
+}