Supporting device suitable for long workpiece machining

The utility model discloses a supporting device suitable for long workpiece machining. Chassis, a bottom plate is arranged at the upper part of the underframe; a reinforcing plate is arranged in the middle of the bottom plate; adjusting rods are arranged in the centers of the reinforcing plate and the bottom plate in a penetrating mode. The upper end of the adjusting rod is fixedly connected withthe supporting plate; the supporting plate and the adjusting rod are further reinforced and fixed through a fixedly-arranged supporting rod. A pair of vertical plates is further arranged on the supporting plate, a U-shaped groove is formed in the upper portions of the vertical plates, a supporting shaft assembly is arranged in the U-shaped groove, the supporting shaft assembly comprises a supporting shaft and bearings, the bearings are arranged at the two ends of the supporting shaft, and the supporting shaft assembly has the advantages of being small in friction loss, long in service life andcapable of being linearly