The mechanism of drive and numeric control of various kind of screw presses are studied.On base of summarizing the progress of screw presses

the drive characteristic of screw presses with friction driving

hydraulic presses driling

clutch dirving or servo dinring are studied

and the numeric antol method of the forging engery for these screw presses is analyzied.The new kind of screw presses drive with variable speed switched reluctance motor system is introduced.A method to contol forging energy by numeric is given

that is by the belt transmission

the gear drive or the direct motor drive and by ussing the function of high start-stop frequeary and positive-negative rotation with chopped current controlling and numeric controlling of motor rotational speed.The collusion is that screw spresses drive by variable speed switched reluctance is simple in structione and effective in energy sowing and will be widely used in mannfacturing production.