Coded lock structure of door and window

The utility model discloses a door and window coded lock structure which comprises a lock body and an unlocking mechanism, the unlocking mechanism comprises a limiting piece, a coded lock piece and a limiting pin, the limiting piece is provided with a containing groove penetrating through the surface of the limiting piece, the coded lock piece is installed in the containing groove in a rotating mode in the vertical direction, and the limiting pin is arranged in the containing groove. The ring side face of the coded lock piece extends out of the containing groove, a limiting groove is formed in the side wall of the coded lock piece, the limiting pin is matched with the limiting groove, and when the coded lock piece rotates to a specific position in the limiting piece and the limiting groove of the coded lock piece corresponds to the position of the limiting pin, one part of the limiting pin moves into the limiting groove, and the coded lock piece is locked by the limiting pin. The limiting piece is separated f