Dismounting wharf crane

The invention provides a dismounting wharf crane, which comprises a base plate, a base, a rotary body and a suspension arm, wherein the base comprises a middle sleeve, a first support component, a second support component and a bearing; the bearing is arranged in the middle sleeve; the first support component and the second support component are fixedly connected to the middle sleeve; the rotary body comprises a rotary shaft and a rotary arm which is fixedly connected with the rotary shaft; the rotary arm can rotate with the rotation of the rotary shaft; the rotary shaft is inserted into the bearing of the middle sleeve of the base; the first end of the suspension arm is connected with the rotary body, and the second end of the suspension arm is provided with a chain block; the suspension arm rotates with the rotation of the rotary body; and a tensioning piece is arranged between the rotary body and the suspension arm and is tensioned and fixed by the chain block. By the technical scheme, the dismounting wharf crane has enough strength and a few machine parts, is corrosion-resisting, small in volume and light in weight, and can realize quick assembly and disassembly without auxiliary equipment.