The small crane is composed of power unit and support. 1. The power unit is composed of motor, reducer, clutch, brake, rope drum, steel wire rope, etc. The motor is a paramagnetic single-phase capacitor motor, which is designed with a mechanism for braking in case of power failure; The motor is also equipped with a thermal switch to prevent the motor from overheating and burning; The reducer is a two-stage gear reducer, which is fixedly connected to the motor; The clutch, brake and fly drum are installed as a whole, but when the clutch is disengaged, it can realize rapid descent. Operating the brake can control the descent speed to avoid impact. The round hole on the front of the power unit housing can be used to install a blower, and the user can equip a blower for forced cooling as required. The housing itself is equipped with a toolbox, which contains a clutch handle, a special wrench with a brake handle, a jack nut washer, a rod top cap, a button starter, a travel switch, wires, instructions, etc. 2. The support part is composed of a main rod and a rotating arm composed of a screw, a jack nut and a vertical rod. The rotating arm can rotate 360 degrees on the main rod, and a travel switch is set at the arm end to prevent the lifting over position accident caused by operation error or button failure. The wire rope can be wound and released by operating the button starter to realize the positive and negative rotation of the motor. The lifting operation can be completed by lifting and lowering objects through some pulleys of the support.