The invention provides a waterproof electric power distribution cabinet, and relates to the field of the power distribution cabinet. The waterproof electric power distribution cabinet comprises a cabinet body; a supporting frame is fixedly connected with the top of the cabinet body; a rainshed is fixedly connected with one end, far from the cabinet body, of the supporting frame; ventilating holesconnected with the interior of the cabinet body are formed in the top of the cabinet body; a supporting plate is lap jointed at the bottom of the cabinet body; clamping grooves are formed in the uppersurface of the supporting plate; a plug pin is inserted in each clamping groove; a lifting plate is fixedly connected with the lower surface of the supporting plate; a movable groove is formed in thebottom of the lifting plate; and a fixed rod is movably connected in the movable groove. According to the waterproof electric power distribution cabinet, by virtue of matching of the supporting frameand the rainshed, an effect of preventing rainwater from entering the interior of the cabinet body from the top of the cabinet body in a rainy day can be achieved; by supporting the cabinet body through the supporting plate, an effect of installing the cabinet body conveniently is achieved; and by inserting the plug pins in the corresponding clamping grooves, an effect of improving stability after the cabinet body is installed is achieved.