The two-speed multi-purpose winch with safety tensioner is mainly applicable to the relocation and auxiliary transportation of mining equipment and various mechanical and electrical equipment in the mining face of the coal mine pit, and can also be used for the coal mine mining operation face, underground yard, downhill and coal mine surface, such as mine car distribution and material transportation work. In addition, it can also be used for the recovery of the operating surface. The double-speed multi-purpose winch of the truck tensioner all adopts the transmission of bevel gear and cylindrical gear, which has the characteristics of simple structure, safety and reliability, convenient repair and simple operation. The width and height of the winch are small in size, suitable for working in the narrow space of the underground; the operation of the winch is simple, with the operation of adjusting the speed, you can simply use the switch to control the switch of the button. the double speed multi winch of JSDB series has 2 speeds of high speed and low speed. Slow speed users can change speed and traction according to the needs of the site to work in different conditions. two-speed multi winch of JSDB series is strictly prohibited for carrying people or promotion.