Driving arm of robot

The utility model discloses a driving arm of a robot, which comprises a base, a rotating component is mounted at the top of the base in a penetrating manner, and the rotating component is used for changing the angle of a driving arm main body. By arranging a knob, when the driving arm is in steering failure, a worker can press two support columns towards one side close to the bottom of the base; a triangular block is driven to move towards one side close to the bottom of a base and move out of the inner side of a circular groove, a worker pushes a supporting column to enable a driving arm body to rotate, the worker can pull out two locking rods from the inner sides of a side groove and a side hole with hands, an air cylinder is started, and the driving arm body rotates. The telescopic end of the air cylinder pushes the driving arm body to move towards the top of the base under the action of external force, so that the vertical position of the driving arm body is raised, various working requirements can be met