The invention discloses an electric pressure cooker and an anti-dislocation structure of an outer-cooker bushing ring. The anti-dislocation structure is used for preventing dislocation of the outer-cooker bushing ring and an outer shell housing. Convex ribs are arranged on one of the lower end surface of the outer-cooker bushing ring and the upper end surface, corresponding to the lower end surface, of the shell housing, and grooves into which the convex ribs are inserted are formed in the other one of the lower end surface of the outer-cooker bushing ring and the upper end surface, corresponding to the lower end surface, of the shell housing. Due to the arrangement, the anti-dislocation structure provided by the invention has the advantages of simplicity and low processing cost.