Pipe cold rolling mill

The utility model relates to a cold-rolling mill, belongs to the technical field of pipe production, and particularly relates to a pipe cold-rolling mill which comprises a base, a cold-rolling mill body is fixedly mounted on the left side of the top of the base, a mounting frame is arranged on the right side of the top of the base, feeding mechanisms are arranged on the two sides of the mounting frame, and a transmission gear ring is movably mounted on the mounting frame in an embedded mode. A movable plate is fixedly mounted in the transmission gear ring, four mounting blocks are movably mounted in the movable plate in an embedded mode, cleaning brushes are fixedly mounted on the wall faces of the sides, close to each other, of the four mounting blocks, an adjusting mechanism and a driving mechanism are arranged in the mounting frame, and the adjusting mechanism comprises an adjusting shaft, an adjusting circular ring, a connecting bearing, a limiting groove and a limiting block. The adjusting shaft is embed