The invention discloses a multi-functional connector special for a power system. The multi-functional connector comprises a sleeve, wherein the sleeve is matched with a binding post of a low-voltage pot head in a sleeved way and has plasticity, a broken groove is formed in one side of the sleeve and is used for cutting a side wall of the sleeve to form two broken walls corresponding to the broken groove, clamping arms are fixedly arranged on outer walls of the sleeve corresponding to the broken walls and outwards extend along the broken walls, corresponding clamping holes are formed in the two clamping arms, clamping bolts are inserted into the clamping holes and are used for clamping the sleeve onto the binding post by the clamping arms, a wiring board is fixedly arranged on an outer wall of the other side of the sleeve and upwards extends, and the wiring board is connected with a cable by a locking device. The multi-functional connector has the advantages of reasonable structure, large contact area, small contact resistance, good cleanness, working stability and reliability, long service lifetime, long maintenance period and low operation cost, is convenient to install a wire and is suitably used in a place with serious air pollution, an overheat or burnt accident is not liable to happen, dust is not liable to paste, and threaded post burn-up or an open-circuit and phase-losing accident caused by heat generation due to loosing of a vibration nut after the power connection device is used for a long time is prevented.