Cold rolled ribbed steel bar is made of hot rolled wire rod by multichannel cold-rolled, reducing a rib and the elimination of internal stress after the formation of a steel bar with two or three surface crescent. Cold rolled ribbed steel bar in priestesses concrete members, is the upgrading production of cold drawn low carbon steel wire, in cast-in-situ concrete structure, can be substitution Ⅰ reinforcement, in order to save steel, is better one in the same kind of cold rolled steel.