The utility model discloses a two-sided limit machine that cuts open for making beam splitting board, it includes frame (1), adjust pole socket (2), the setting is in mounting panel (3) at frame (1) top, cut open limit device and feeding mechanism, be provided with two mutually opposite regulation pole sockets (2) on mounting panel (3), install on guide rail A (5) slider A (9), connecting plate (10) set up the top in slider A (9), the one end of regulating block (6) is fixed on connecting plate (10), the other end and lead screw (4) the threaded connection of regulating block (6), it fixes on connecting plate (10) through top sword piece (16) to cut open the afterbody of knife tackle (8), the discharge gate setting of feed bin (12) is directly over pay-off platform (15). The beneficial effects of the utility model are that: the problem of the work piece blank need artifical pay-off, stirring before processing is solved, safe and reliable, improve production efficiency, reduce intensity of labour, realize that the two-sided radius angle of beam splitting board is automatic.