The utility model relates to a rolling device of a cold rolling mill. The rolling device mainly adopts the technical proposal that an upper supporting roller, an upper working roller, a lower working roller and a lower supporting roller are respectively arranged in an identical vertical plane, and an upper middle roller and a lower middle roller are respectively arranged in the other vertical plane inclined to the direction opposite to the advancing direction of a first rolling length of strip. The rolling device is characterized in that the upper middle roller and the lower middle roller are deviated from the upper supporting roller, the upper working roller, the lower working roller and the lower supporting roller. The roller surfaces of the upper middle roller and the lower middle roller are symmetrically fabricated so as to form a certain taper. The rolling device has the advantages that the structure is simple, compact and reasonable; because the upper and the lower middle rollers do not make axial movement, the manufacture is convenient, and the reliability of the cold rolling mill can be enhanced; since the upper and the lower middle rollers are deviated relatively to the assembly for the supporting rollers and the working rollers, the stability of the cold rolling mill can be enhanced; the middle rollers are adopted for transmission, thereby he diameters of the working rollers can be reduced, and the extremely thin strip can be rolled under the condition of constant rolling force.