The invention provides a cold extruding process. Fabrication of center holes at two ends of a shaft is completed through cooperation between an oil hydraulic press and a die, wherein the die is composed of an upper die and a lower die, the upper die is installed on an upper working platform of the oil hydraulic press, the lower die is installed on a lower working platform of the oil hydraulic press, and the upper die and the lower die are respectively provided with a die cavity matching with the shaft; a to-be-fabricated shaft is put in the die cavity of the lower die, then the upper working platform drives the upper die to press downwardly, and the upper die and the lower die cooperate with each other to finish fabrication of center holes at two ends of the shaft. According to the process provided in the invention, fabrication of the center holes at two ends of the shaft is finished through one extrusion, so precision of coaxiality of the two center holes is substantially improved, processing in a subsequent procedure is facilitated, product quality is greatly improved, and raw materials are saved by 19%; meanwhile, frequency of mechanical cutting is reduced, which enables time for subsequent lathe machining to be saved, two-stage fabrication in conventional methods is changed into one formation, and thus, working hours are saved by about 25% as a whole.