The invention provides a cable connector using an insulation-piercing mode to connect cables, the connector body is manufactured by using aluminum casting alloy and is externally coated with an insulating layer, the connector body comprises a main connecting body, a clamping body is connected on the main connecting body by connecting bolts, clamped innerarc surfaces are arranged at the positions where the main connecting body and the clamping body are contacted with cables and are intensively provided with clamped prickling pins which are casted and shaped at the same time with the main connecting body and the clamping body, the main connecting body is provided with a threaded mounting hole, the clamping body is provided with a fan-shaped connecting hole, the outer side of the clamping body is arranged in an arch shape, and the connecting pressure of the connector is undertaken by the aluminum alloy body. The invention has the advantages that the clamped prickling pins are sued to pierce the cable insulating layer and be communicated with a conductor on the premise of not stripping off the cable insulating layer, so that cables can be connected rapidly and effectively. The invention has the advantages of strong anti-overloading capacity, good copper-aluminum transition performance and favorable reducing joint performance.