The invention discloses a turning roll device which comprises a roll body capable of rotating around the axis of itself. The turning roll device further comprises a movable support and a fixed base, the roll body is arranged on the movable support, and the axial direction of the roll body is consistent with the length direction of the movable support. The movable support is arranged on the fixed base, the length direction of the movable support is consistent with that of the fixed base, and according to the arrangement of the movable support, the movable support can carry out displacement relative to the fixed base in the length direction of the fixed base. The invention further discloses a strip steel cold rolling production line. The strip steel cold rolling production line is arranged in a horizontal plane, and comprises at least one turning roll device, and an angle is formed between the axis of the roll body in the turning roll device and a strip steel running center line. Deviation of conveyed strip steel can be corrected in time through the turning roll device, and therefore the quality of the strip steel is improved, and unit equipment is protected. According to the strip steel cold rolling production line, site space can be fully utilized, and the limitation of the field environment to the cold rolling production line is broken through.