The invention belongs to the field of electrical equipment, and relates to a fixing device for a pressing machine. The fixing device for the pressing machine comprises a mobile bracket; a telescopic vertical column which vertically upwards extends is arranged on the mobile bracket; the telescopic vertical column comprises an outer column and an inner column, wherein the outer column is fixedly connected to the mobile bracket; a plurality of circular holes which are distributed at equal intervals along the vertical direction are uniformly formed in the surface of the outer column; the inner column is arranged in an inner hole of the outer column; spring pins, which are matched with the circular holes to adjust the height of the telescopic vertical column, are arranged on the surface of the inner column; an arm beam is connected to the top end of the inner column; an electric hoist is hoisted at the outer end of the arm beam. With the adoption of the device, the time of mounting a cable plug- in and out terminal can be effectively reduced, and the working efficiency can be raised.