Manipulator is developed in the process of mechanization and automation of a new type of equipment, it is an important area of the industrial robot, its characteristic is that can be done by programming the default task, on the structure and properties of both human and mechanical advantage, in the modern industrial production process, the manipulator is widely used in automatic production line, now the factory a lot of the manipulator, In the flexibility may not be comparable to the real hand, but it is not afraid of fatigue, not afraid of danger, can be uninterrupted continuous work, can effectively improve industrial productivity, because of many advantages suitable for industrial production, manipulator has been widely used [1].