The invention discloses a safe and simple swivel caster, including a mounting plate, a supporting frame, a hub, a tire, a protective shell, a hairbrush, an outer ring gasbag, drying apparatus and a storage battery. Four corners of the mounting plate are provided with connection bolts. A through hole is arranged at the middle position of the mounting plate. The top end of the supporting frame is arranged through the mounting plate and provided with a round plate. A friction protection pad is arranged between the supporting frame and the mounting plate. The bottom end of the supporting frame isconnected with a center axis of the hub. The outer wall of the hub is provided with the tire. The tire is detachably provided with the outer ring gasbag. The supporting frame is provided with the protective shell, the inner wall of the bottom end of the protective shell is provided with the hairbrush, and the lower surface of the mounting plate is provided with the drying apparatus. According to the safe and simple swivel caster, the impact of friction on the device is reduced, the service life is prolonged, the diameter of a rotating wheel is increased, the tire is convenient to clean, the wet ground during rainfall to affect use is avoided, and at the same time, the service life is prolonged, the structure is simple, use is convenient, and popularization can be better conducted.