The invention discloses a T-shaped rib welding and fastening device. The T-shaped rib welding and fastening device is characterized in that six to nine movable frames arranged along the circumferenceat equal intervals are arranged on a jig frame, plate grooves are formed in the movable frames, and the two sides of each plate groove are provided with a perpendicular pressing rod and a horizontal cam of a web and a flange plate correspondingly. According to the T-shaped rib welding and fastening device, compared with the prior art, the structure is simple, welding is convenient, horizontal andperpendicular deformation of the flange plate and the web is well controlled, the manufacturing technology is effectively improved and simplified, the welding quality of a workpiece is greatly improved, and the manufacturing cost is further reduced.