The invention relates to a vehicle-mounted hoisting device, and relates to the technical field of hoisting in order to solve the problems that the existing vehicle handling equipment has a larger occupied area, is not easy to take in and put away, and can not complete the hoisting work for short-distance equipment. The vehicle-mounted hoisting device comprises a lifting mechanism, a swing arm, a lifting rope, a lifting hook and a driving unfolding and folding mechanism, wherein the lifting mechanism is hinged to the end of a truck fence, and the truck fence and the lifting mechanism are respectively hinged to the driving unfolding mechanism and allow the lifting mechanism to be folded and contracted; the telescopic direction of the folded lifting mechanism coincides with the driving direction of a truck, and one end of the swing arm is fixedly arranged at the moving end of the lifting mechanism; the other end of the swing arm is provided with the lifting rope, and the end part of the lifting rope is provided with the hosting hook for hoisting the cargo. The vehicle-mounted hoisting device provided by the invention is used for a truck.