The invention discloses a circular steering wheel. The circular steering wheel comprises a main body, a first fixing strip, a second fixing strip, a third fixing strip, a fourth fixing strip, a first matching part, a second matching part, a third matching part, a fourth matching part, a matching connecting piece and a plurality of friction parts, wherein the main body is circular; the cross section of the main body is pentagonal; the first matching part is triangular; the second matching part is circular; the third matching part is pentagonal; the fourth matching part is square; and the friction parts are T-shaped. When a person touches the friction parts with hands, the sense of touch is good, touch fatigue of the hands of the person is relieved, meanwhile, the first matching part is triangular, the second matching part is circular, the third matching part is pentagonal, the fourth matching part is square, therefore, a driver can observe different reference substances to simply distinguish the rotating angle of the circular steering wheel, and the circular steering wheel is novel in structure, skillful in design and high in practicality.