The invention discloses a dumper power supply system, which comprises an installing station, a storage battery case and a super capacitance cabinet which are arranged at one side of a dumper head; thestorage battery case and the super capacitance cabinet are arranged at the installing station. The power supply system is reasonable in layout and fully uses the space beneath an escalator at one endof a bumper in front of the dumper, thus the space of a walking board and a carriage for mounting the storage battery case and the super capacitance cabinet originally can be saved; the storage battery case and the super capacitance cabinet are installed at one end of the front bumper to balance the weight of both ends of the front bumper, thus the whole dumper is more balance in counterweight. The storage battery case and the super capacitance cabinet are installed at a low position, and the installing opening of the storage battery in the storage battery case is outwards, thus operators canreplace the storage battery conveniently. Besides, for the installing position is lower, the gravity of the whole dumper is reduced, and the stability of the whole dumper is better.