Four-roll universal mill

The utility model relates to a four-roll universal mill which comprises a working roll I, a working roll II, a working roll III and a working roll IV, wherein the working rolls I, II, III and IV are distributed in a mutually 90-degree manner in sequence on a same plane, and the four-roll universal roll is characterized in that torsion transmission devices are arranged among the working rolls I, II, III and IV to form a four-driving-roll double-power input structure, or the torsion transmission devices are arranged between the working rolls I and II, between the working rolls II and III, and between the working rolls III and IV so as to form a four-driving-roll single-power input structure. Compared with the prior art, the four-mill universal mill has the advantages that the torsion transmission devices can lead all rolls to transmit torsion, and can ensure that the meshing of bevel gears is reasonable and stable when the torsion is transmitted; and each working roller has a radial and axial adjusting function