Winch

The utility model provides a winch, which relates to the technical field of hoisting machinery and comprises a winding roller. The steel cable is wound on the winding roller; the driving mechanism drives the winding roller to rotate forwards and backwards in the axial direction of the winding roller; the driving mechanism and the winding roller are fixedly arranged on the base, and the base comprises a bottom frame fixedly arranged at the bottoms of the driving mechanism and the winding roller and extension plates which are arranged at the two ends of the bottom of the bottom frame in a sliding mode and used for extending the length of the base; and after the position of the extension plate relative to the underframe is adjusted, the extension plate is fastened by a positioning bolt. According to the winch, the length of the base can be extended, the winch is suitable for different construction environments no matter hoisting or foundation pit erecting, and the base does not need to be replaced frequently; an