Feeding device of numerical control machine tool

The numerical control machine tool feeding device comprises a pipe body and an air cylinder, a plurality of adjusting rods are distributed in the pipe body in an annular structure mode, a strip-shaped opening is formed in the bottom face of the pipe body in the axial direction, a plate chain conveyor is arranged at the lower end of the pipe body, a plurality of push plates are installed at the position, right opposite to the strip-shaped opening, of the plate chain conveyor, and the outer portions of the adjusting rods are sleeved with extrusion rings. The top face of the pipe body protrudes to form a thickening part, electric sliding tables are installed in the installation grooves, the outer rings of the extrusion rings are installed on moving platforms of the electric sliding tables, and positioning pieces are installed at the two ends of the adjusting rod. The device is simple in structure, the distance between the adjusting rods can be adjusted according to the diameter of a workpiece, the workpiece and