The invention discloses a power supply connector of power lithium battery pack. The power supply connector of power lithium battery pack includes a housing, wherein first conduits are uniformly connected with the left side of the housing; second conduits are uniformly connected with the right side of the housing; the front side and the back side of the housing are each provided with a positioningplate; a cover plate is arranged on the housing; a standing groove is arranged between the housing and the cover plate; the standing groove is fixedly connected with a butt plate through screws; a positioning groove is uniformly formed in the butt plate; the top of the positioning groove is fixedly connected with a press plate through screws; bulges are uniformly arranged on the bottom of the press plate; and the left and right ends of the each first conduit and the each second conduit are each provided with an arc chamfering. As bulges are uniformly arranged on the bottom of the press plate,the connector and the connecting pieces are pressed together firmly, so that loosening can be prevented effectively and the anti-tension performance can be greatly improved; and as four corners of theeach positioning plate are each provided with a positioning hole, so that the housing can be fixedly connected conveniently.