Hydraulic balance tower crane

The invention provides a hydraulic balance tower crane, which comprises a vertical tower crane frame, a horizontal balance arm, a lifting arm, a base and the like. One end of both the balance arm and the lifting arm is arranged on the tower crane frame; the tower crane frame is provided with a balance detector which mainly comprises a balance pull detector and a lifting pull detector and connected with a balance arm stayed-cable and a lifting arm stayed-cable; and the balance detector is connected with an electrical cabinet through a sensor. The two ends of the balance arm are provided with a liquid storage tank (5) and a liquid storage tank (6) and the two storages tanks on the balance arm are provided with a double-way electric infusion pump in between; and the two storage tanks are connected through two sets of delivery pipes to form a mutual circulating system, so the total weight of the liquid storage tank (5) can change along with the requirement of the balance and finally the whole tower crane reaches