Steel structure corner painting device

The utility model belongs to the technical field of steel structures, and particularly relates to a steel structure corner painting device which comprises a base, a transversely-arranged electric sliding table is installed at the top of the base in a matched mode, a driving motor is connected to the top of the electric sliding table, and a machining table is fixedly connected to an output shaft ofthe driving motor. A supporting plate is welded to the right side of the top of the base, a rectangular mounting opening is formed in the upper end of the supporting plate, a lead screw is rotationally connected to the inner wall of the rectangular mounting opening, a hand wheel is fixedly connected to the top end of the lead screw, the lower end of the lead screw is in threaded sleeve connectionwith a moving block, and mounting holes are formed in the side wall of the moving block and the side wall of the supporting plate. A first paint inlet pipe and a second paint inlet pipe are respectively clamped on the inner w