Waterproof power supply box

The utility model discloses a waterproof power supply box, which comprises a box body and an upper cover integrally connected with the box body, the box body comprises a plurality of wire holes arranged on a side wall, and a cover body is arranged on the wire holes; a wire passing channel is formed in the middle of the wire hole. The wire hole comprises a threaded part located at the tail, an extrusion part located at the head and a step part located in the middle. The cover body comprises a threaded groove which is located in the inner wall of the tail portion and corresponds to the threadedportion, the cover body further comprises an inlaying groove, a sealing rubber ring is inlaid in the inlaying groove, the step portion abuts against the sealing rubber ring, the cover body further comprises an opening located in the head portion, the opening is in an inward splayed shape, and the extrusion portion penetrates through the sealing rubber ring to be tightly attached to the inner wallof the opening. The utilit