Manipulator of robot

The utility model discloses a robot manipulator which comprises a base, moving wheels are installed at the two ends of the bottom end of the base, a fixing plate is fixedly connected to the middle of the bottom end of the base, supporting rods are movably connected to the two sides of the fixing plate, and a connecting spring is fixedly connected to one side of each supporting rod. And the ends, away from the side walls of the supporting rods, of the connecting springs are fixedly connected with limiting blocks, and first limiting grooves allowing the limiting blocks to be connected in an inserted mode are formed in the inner side wall of the base. Free movement of the mechanical arm can be achieved through the moving wheels, the supporting plate can be driven to make contact with the ground after rotating through rotating connection between the supporting rod and the fixing plate, a limiting block and a second limiting groove are connected in a limiting mode, and stable supporting of the mechanical arm after