A power supply connector assembly device, having a power supply connector includes a front insulating body and a rear insulating body. The front insulating body with a holding cavity that is used to hold a first conductive terminal, and the first conductive terminal comprises holding slots that hold a protruding portion formed central of an insulating body. Embedding grooves are defined on the protruding portion that enable a second conductive terminal to embed therein, and a through hole is further defined in the protruding portion that provides for the signal terminal to clamp therein.