Protective device and system for cutting cable of coal mining machine

The utility model provides a protection device for a cutting cable of a coal mining machine. The protection device comprises a base, a mounting box, a cover plate, a support frame, an elastic assembly, a telescopic rod and a U-shaped frame, one end of the supporting frame is installed perpendicular to the base, the other end of the supporting frame is rotationally connected with the installation box, a pair of elastic assemblies is arranged on the side, close to the base, of the installation box, cable grooves are formed in the side face of the installation box, cables are arranged in the installation box by penetrating into the cable grooves, the inner side wall of the installation box is slidably connected with a U-shaped frame, and telescopic rods are fixedly connected to the corners of the two sides of the U-shaped frame. The two ends of the telescopic rod are fixedly connected with the inner side wall of the mounting box, the telescopic rod is sleeved with a first spring, the two ends of the first spring