Lead screw supporting device for rail lead screw carrying structure

The invention discloses a lead screw supporting device for a rail lead screw carrying structure. The two ends of a lead screw are supported and mounted on a machine frame, a rail parallel to the leadscrew is mounted at the position, above the lead screw, of the machine frame, a working sliding block, and a left and right auxiliary sliding block are jointly mounted on the lead screw and the rail,and a left and right obstruction component is fixed at the position, in the middle of the lead screw, below the machine frame; in the working sliding block, the working rail sliding block is connectedwith the rail in an embedded and mounted mode, a transmission nut is arranged on the lead screw in a sleeving mode through a threaded, two magnetic plates are fixed at both ends, in the axial direction of the lead screw, of the transmission nut, and an auxiliary wheel is in rolling contact with the side face of the machine frame; and in the auxiliary sliding block, the auxiliary rail sliding block is mounted in the rail in