Flattening roller fixing structure of cold rolling mill

A flattening roller fixing structure of a cold rolling mill comprises a flattening roller, the two ends of the flattening roller are fixed to inner rings of bearings, outer rings of the bearings are fixed to bearing seats, the flattening roller fixing structure comprises a U-shaped fixing frame, the U-shaped fixing frame is vertically arranged, the opening direction of the U-shaped fixing frame is upward, the bearing seats are located in the U-shaped fixing frame, first through holes are formed in the four corners of the U-shaped fixing frame, and the first through holes are communicated with the first through holes. First through holes are formed in the U-shaped fixing frame, first bolts are arranged in the first through holes and are in threaded connection with a rack of the cold rolling mill, a sealing cover is arranged above the U-shaped fixing frame and the bearing seat, second through holes are formed in the two ends of the sealing cover, second bolts are arranged in the second through holes, and the se