The invention provides a long-pole-type clamp ammeter, which comprises a connection rope, an insulated telescopic rod, a clamp ammeter header, a connector, an insulated holding handle and an operationplatform, wherein the bottom portion of the clamp ammeter header is in detachable connection with the connector, and the clamp ammeter header is in electrical connection with the operation platform;the connector is in detachable connection with the clamp ammeter header, and is fixedly connected with the insulated telescopic rod; the insulated holding handle is in sleeve connection with the bottom portion of the insulated telescopic rod and is fixedly connected with the operation platform; and the operation platform is fixedly connected with the insulated holding handle, and is electrically connected with the clamp ammeter header through an insulated telescopic rod hollow wire. The insulated telescopic rod can be adjusted at will to reach a required length; the header can adjust direction; and a displayer can clearly display information without being influenced by angle.