The invention provides a tower section, a tower frame, a wind generating set and a manufacturing method of the tower section. The tower section comprises a tower section main body (4) and longitudinalflange pairs (9); the tower section main body (4) is divided into at least two segments through longitudinal seams (6) formed in the longitudinal direction; and the longitudinal flange pairs (9) arearranged in the longitudinal seams (6) in the longitudinal direction and protrude out of the inner surface (41) and the outer surface (42) of the tower section main body (4) in the radial direction and are welded to the corresponding segments. According to the tower section, welding construction difficulty can be lowered, heat generated in the welding process is reduced, and the welding quality isimproved.