The utility model relates to a lifting device. The lifting device comprises a lifting rod and a control body; the lifting rod penetrates through the inner part of the control body and then is connected movably with the control body; a plurality of tooth-shaped blocks are arranged at equal intervals on the left and right two sides of the lifting rod, limiting slots are formed in the front and back surfaces of the lifting rod; the control body comprises a box-shaped body; two limiting wheels are arranged in a mode of penetrating the front and back surfaces of the box-shaped body; a labour-saving warp is arranged on the right side of the box-shaped body, a telescopic spring is arranged below the labour-saving warp; a cantilever hook is arranged on the inner wall of the right side of the box-shaped body; an elastic pin is arranged above the cantilever hook in the form of penetrating through the inner wall of the right side of the box-shaped body. The labour-saving warp of the control body and one end of the cantilever hook are configured to be an arc-shaped hook, and a rigid spring is arranged on the elastic spin. By utilizing the structure, the intermittent rising motion of the lifting rod can be realized by pulling the labour-saving warp repeatedly by manpower; when descending the lifting rod is needed, the descending of the lifting rod is realized by pushing the elastic pin of the right side of the box-shaped body to trigger the tooth-shaped block attached to the cantilever hook to be separated from the cantilever hook; the lifting device is simple in structure, easy to operate and high in practicability.