The utility model relates to an automatic play screw machine combination screw. This automatic play screw machine combination screw includes screw and the peaceful pad of the bullet pad of cover on the screw, the flat external diameter that fills up is less than or equal to the maximum outer diameter of screwhead. The utility model discloses a flat external diameter that fills up equals or is lessthan the maximum outer diameter's of screwhead setting among the automatic play screw machine combination screw for it can export from make the screw machine automatically smoothly to make up the screw, avoids making up the screw and take place the bail phenomenon in making the screw machine automatically, thereby promote the use of combination screw in the automation equipment.