2219C10S aluminum alloy welded joints were obtained by stationary shoulder friction stir welding (SSFSW). The paper presented the typical macroscopic and microstructural characteristics of welded joints, the influences of welding parameters on the forming characteristics and the mechanical properties of welded joints. The results showed that as compared with the traditional friction stir welding (C-FSW), flash and the defects of the weld could be effectively avoided during welding due to the structural characteristics of the stationary shoulder mixing head. With the increase of welding speed, the joint nuclear changed from "bowl" to "waist drum", and the volume decreased, and the welded joint was also specially characterized with the shoulder-affected zone. The microhardness distribution of the welded joints presented a unique "∪" shape, and the nuclear was the lowest. With the increase of welding speed which was under 250 mm/min, structure property increased; when welding speed reached to 300 mm/min, the structure property fell sharply.