The invention discloses a lifting machine which comprises a main trolley base. A rotating platform is arranged on the main trolley base. The rotating platform is provided with a lifting device, a lazy arm stabilizing device and a platform rotating device. The lifting device comprises a lazy arm and a lifting device body. The lazy arm stabilizing device comprises a telescopic supporting rod, two inhaul cables and two winches; wherein one end of the telescopic supporting rod is connected with the rotating platform, the other end of the telescopic supporting rod is connected with the lazy arm, one ends of the two inhaul cables are wound around the two winches, and the other ends of the two inhaul cables are connected with the lazy arm. The main trolley base is further provided with a plurality of telescopic supporting pillars. By means of the lifting machine, the purpose of adjusting the position and angle of the lazy arm is achieved by adjusting stretching and contracting of the telescopic supporting rod so that the whole adjusting process can be easier and more stable; the two inhaul cables are used for keeping the lazy arm stable and also used for preventing people from being hurt when mechanical faults happen to the telescopic supporting rod; and in addition, the winches can be rocked to be matched with the telescopic rod to adjust the position of the lazy arm.