The invention provides a radial forging manipulator for regulating speed and braking by axial movement of a worm, and belongs to the field of radial forging equipment. The radial forging manipulator for regulating speed and braking by axial movement of the worm is characterized in that nodal velocity generated by rotation of a worm shaft driven by a main motor through belt transmission and axial feed velocity generated by the worm shaft pushed by a main hydraulic cylinder are synthesized; when the magnitude and direction of the nodal velocity and the magnitude and direction of the axial feed velocity are consistent, nodal synthesized velocity is increased, and the manipulator clamps a workpiece to rotate; when the magnitude and direction of the nodal velocity and the magnitude and direction of the axial feed velocity are opposite, the nodal synthesized velocity is reduced; and when the magnitude of the nodal velocity and the magnitude of the axial feed velocity are equal to each otherand the direction of the nodal velocity and the direction of the axial feed velocity are opposite, a worm gear and a spindle of the manipulator stop rotating, and at the moment, a forging machine carries out forging. The radial forging manipulator for regulating speed and braking by axial movement of the worm has the advantages that problems of slow braking and severe abrasion due to cooperation of a clutch and a disc brake and the problem of workpiece distortion caused by braking of a force of friction between a forging hammer and the workpiece are solved, and the radial forging manipulator is stable in running, simple in structure and long in service life.