Auxiliary support device for milling machine

The invention discloses an auxiliary support device for a milling machine. The auxiliary support device comprises a base, support wheels, a lower support plate, and an upper support plate for fixing a part to be processed, and is characterized in that the base is provided with guide rails; the four support wheels are fixed on the lower support plate; the lower support plate is provided with a lower axle hole which is fixed together with the lower end of a support shaft; the upper support plate is provided with an upper axle hole which is in clearance fit with the upper end of the support shaft; the top end of the support shaft is provided with a pressure plate for limiting the upper support plate; and the upper support plate is provided with a clamp structure. Due to the adoption of the auxiliary support device for the milling machine disclosed by the invention, supporting of to-be-processed workpieces is realized, and automatic milling processing of the workpieces is realized; and the width of a workpiece pr