The invention disclose a lifting device. The lifting device comprises a first supporting part, a second supporting part, a lifting assembly, a rotating shaft and a driving part; the first supporting part and the second supporting part are oppositely arranged, the rotating shaft is rotationally arranged on the first supporting part, the driving part is connected with the rotating shaft so as to drive the rotating shaft to rotate, the lifting assembly comprises a supporting rod and a driving rod, the supporting rod is hinged to the driving rod, one end of the supporting rod is hinged to the second supporting part, the other end of the supporting rod is in sliding connection with the first supporting part, one end of the driving rod is fixedly connected with the rotating shaft, and the otherend of the driving rod is in sliding connection with the second supporting part. According to the lifting device, the space occupied in the vertical direction can be reduced, and the production cost of a mold can be reduced.