Changing the form of previous manipulation and throttle operation individually,Realization of the bilateral handle synchronous and driving throttle acceleration and deceleration automatically, due to the speed change steady,it can easily to carry out the lifting work. 2.End position automatic hook device Maximum savings in preparation time before and after operation, to ensure that customer’s vehicle could be in a driving state in the shortest time, and prevent crane damage accident caused by hoist swing to enhance the safety of driving. 3.Hoisting overwinder device If a user is negligent or unfamiliar with the operation of lifting hooks,the hoisting overwinder device will stop hook raise in time, to prevent the safety of personal and property caused by fracture of wire rope. 4.Slewing locking device Slewing locking device can ensure that the lifting arm does not sway because of the centrifugal force during the driving and steering process of the vehicle,to avoid all kinds of accidents caused by swaying. 5.Dual pump converging The hydraulic system adopts dual high pressure gear pump, multi-way valve hoisting joint to realize the converging, to improve the speed of winch, at the same time, it can realize the compound action of crane. 6.Torque limiter It can select torque limit overload protection device to prevent users because of negligence or unfamiliar with the lifting operation principle of overload operation, thereby causing the vehicle rollover and crane damage accidents.