The invention relates to a cold pressing device, in particular to a cold pressing device for powder. The cold pressing device for the powder comprises a press beam, anti-pulling columns, a cold pressing cylinder, a hydraulic case, upper press rods, lower press rods, a hydraulic-oil control port, a hydraulic ejector and a retaining plate. The cold pressing device is characterized in that the retaining plate is attached to the inner side of the cold pressing cylinder and is fixed with the cold pressing cylinder through a screw, three cold pressing holes are formed in one section of the cold pressing cylinder, the lower press rods and the upper press rods are respectively vertically put into the holes, and powder in need of cold pressing fills positions between the upper press rods and the lower press rods. By the cold pressing device, a plurality of groups of powder can be subjected to cold pressing by the same technology simultaneously, so that time for processing the powder by the same technology is greatly shortened.