The impeller, including the impeller, is provided with a number of flow guides on the entrance of the impeller away from the flow passage of the impeller; the center of the impeller is centered around the center of the impeller and is located on the edge of the impeller. The leaf guide wheel produced by our company is designed by advanced CAD software, and processed by CAM five axis, so as to ensure the stability and accuracy of the product line of the leaf guide wheel.