DSJ telescopic belt conveyor is mainly used for gate road transportation on underground comprehensive mining, top-grade conventional mining or general conventional mining face in coal mines, it can also be used for tunnel heading transportation, meanwhile, it can also be used for material conveying in applications with variable transportation distance such as mines, chemical engineering, metallurgy, harbor, wharf, etc. Its main characteristic lies in the automatic movement of its tail along with the shift of mining face and the ability of extension or contraction of its conveying distance. The conveyor is of compact construction, can be directly laid on the bottom plate of gate road or suspended from the top plate of gate road without foundation, it has light frames, which are connected with “E”-shaped pins or elastic straight pins instead of bolts, thus making both assembly and disassembly very convenient. The conveyor belt employs solid core belt, which is connected with mechanical joints. In case of comparatively big conveying capacity and conveying distance, it can be equipped with intermediate drive to meet the requirements for material conveying. Besides controllable soft start, power equalization and automatic regulation and control of conveyor belt tension for its functions, it is especially provided with rigorous monitoring and sensor systems and reliable safety protection facilities. This belt conveyor can meet the safety requirements for special applications like coal mines, etc. All works like operation, monitoring, safety, protection, etc. on the entire conveyor are directly controlled by a microcomputer according to preprogrammed routine, therefore, it can meet the requirements for explosion protection in coal mines and ensure safe and reliable operation.