It is a multi-high rolling mill, including a stand; An upper roller system and a lower roller system, wherein each upper roller system comprises a working roller; And a roll gap adjusting device for adjusting the roll gap between the two work rolls. Each roll system further comprise a supporting roller position outside that corresponding working roller, and the work roller and the outer supporting roller are arranged in a tower structure; and in the same layer of supporting rollers including more than two supporting rollers, the diameter of the outer supporting roller is larger than that of the inner supporting roller. The adoption of the multi-roller mill of the utility model can not only save the roller materials, but also balance the service life of the bearings of each support roller and reduce the downtime, thus improving the production efficiency.