Pipe cutting device capable of automatically separating waste materials

The invention relates to a pipe cutting device capable of automatically separating waste materials. A pipe cutting device capable of automatically separating waste materials comprises two side machining frames, an upper support, a guide plate, a cutting motor, a cutting lead screw, a cutting machine, a feeding box, a machining box, a lifting frame, a feeding mechanism, a clamping mechanism, a limiting mechanism, a decompression mechanism and a separating mechanism. An upper support is fixedly connected to the left sides of the two side machining frames jointly, a guide plate is fixedly connected to the left sides of the two side machining frames jointly, a cutting motor is installed on the side machining frame on the front side, a cutting lead screw is installed on a rotating shaft of the cutting motor, and the end, away from the cutting motor, of the cutting lead screw is rotationally connected to the guide plate. A cutting machine is in threaded connection with the cutting lead screw and is in sliding conne