This model of cargo crane is used as a barge for delivery of cargo and is one of the most important equipment of ships. Also, this crane has high lifting capacity, easy handling, good braking performance, good impact resistance, safe and reliable, loading and unloading with high efficiency. It has a hydraulic system that manages all movements including looping, rotation and lifting independently. The speed and direction are controlled by controlling the direct ratio of the closed oil pump and there is no balance valve in the system which reduces heat loss. It can be said that compared to other systems in terms of proportional control, smooth operation, control accuracy, power loss and other features. The overall transmission efficiency of a closed pump control system can reach 75%, which is much higher than the 50% efficiency of an open system. High transmission efficiency and small fuel tank size make the system structure very compact. When multiple actuators operate simultaneously, the traffic of each actuator is independent of the load.