Steering knuckle and suspension device of automobile

The invention provides a steering knuckle and suspension device of an automobile. The steering knuckle comprises a steering knuckle body, wherein an axle hole allowing a hub unit to be mounted is formed in the middle of the steering knuckle body, and a plurality of connecting arms extending outwards are arranged in the circumferential direction of the steering knuckle body; and a mounting seat for being connected with corresponding automobile parts is arranged on each of the connecting arms, each of the connecting arms comprises a rear trailing arm connecting arm and a toe-in adjusting arm connecting arm, and the rear trailing arm connecting arms and the toe-in adjusting arm connecting arms form the whole connecting arm. According to the steering knuckle and suspension device of the automobile disclosed by the invention, the rear trailing arm connecting arms and the toe-in adjusting arm connecting arms form the whole connecting arm, so that compared with the prior art in which connecting arms are relatively i