Rectangular reciprocating circulation feed mechanism for screw-driving automatic line

The utility model relates to a rectangular reciprocating circulation feed mechanism for a screw-driving automatic line. The rectangular reciprocating circulation feed mechanism comprises a table plate horizontally arranged. A feed device used for pushing work-pieces to the processing position is arranged above the table plate. A locating device matched with the work-pieces of the processing position is arranged below the table plate. Circulation motion of the feed device and circulation motion of the locating device are respectively controlled by a first air cylinder and a second air cylinder. According to the technical scheme, the locating device is used for limiting the pushing direction of the work-pieces so that the work-pieces can be located accurately in the screw-driving process; the first air cylinder and the second air cylinder enable the whole mechanism to achieve reciprocating circulation motion, and the continuous automatic feed function can be achieved.