The utility model discloses a manipulator which is applicable to screws in different sizes. The manipulator comprises a supporting frame, a vertical moving part, a first transverse moving part, a sucking part and a limiting assembly, wherein the vertical moving part is fixedly arranged on the supporting frame, the first transverse moving part slides on the vertical moving part, the sucking part is connected onto the first transverse moving part, the limiting assembly is placed at the lower end of the sucking part and is used for packaging a screw, and the limiting assembly comprises two symmetrical and movable limiting units and two second transverse moving parts which are respectively connected to the lower ends of the limiting units. According to the manipulator provided by the utility model, the screw is stably transported through the clamping of limiting plates and the threads of a stud, and the shapes of the limiting plates can also be changed, so that the manipulator is simultaneously applicable to the screws in different sizes.