PURPOSE: To prevent a die from breaking by precisely managing a compression amount or surely preventing the interference of a punch and a step part in a cavity of a die. Further, to prevent the die from breaking by surely preventing the interference of the punch and the step part even in an idling time.

CONSTITUTION: In a powder molding press of a hydraulic system or a screw system, the press is once 'stopped before the compression is finished, and then advanced to the final compression after confirming the compatibility of the compression force at one stop time. Further, the compression control of the punch 4 and the die 1 is made to a closed circuit control between a ram on which the punch 4 is connected and a die plate 2 by which the die 1 is supported, and the distance between the one time stopped top end of the punch 4 and the step part 16a of the inner circumference of the cavity 3 is set larger than the deflection amount of the punch 4 and the die plate generating due to the max. compression force to be applied.