Abstract: A metal screw cap (1), a pop-top can and a metal screw cap (1) manufacturing method. The metal screw cap (1) includes a screw cap body (10), where an inner wall of the screw cap body (10) encloses a channel for liquid to flow out; the screw cap body (10) includes a threaded portion (11), an arc-shaped portion (12) and an hemming portion (13); the arc-shaped portion (12) includes a plurality of circular arc-shaped segments connected end to end; the threaded portion (11) is used for threaded sealing connection with a lid, and the hemming portion (13) is used for seaming with a turned edge of a can body. The pop-top can includes the can body and the metal screw cap (1). The metal screw cap (1) manufacturing method is used for manufacturing the metal screw cap (1).