The invention relates to an integral roller system comprising an upper bearing seat and a lower bearing seat which are used for fixing an upper roller and a lower roller. Springs driving the upper bearing seat and the lower bearing seat to separate are arranged between the same, the lower ends of bearing seat uprights are fixedly connected with the lower bearing seat while the upper ends of the same are connected with cross beams, the cross beams are uniform with the upper roller and the lower roller in length direction, the lower portions of the cross beams are disposed on the upper bearing seat in a pressed manner, a plate face, positioned on material incoming and discharging sides of a to-be-rolled material, on the upper bearing seat and a corresponding face on the bearing seat upright form limiting and sliding fit, limiting fit is used for limiting moving of the upper bearing seat along the axial direction of the roller and advancing direction of the material, and direction of sliding fit refers to moving along the up-down direction of the upper bearing seat. The upper bearing seat and the lower bearing seat together with the upper roller and the lower roller are connected through the bearing seat uprights and the cross beams to form an integral roller system structure, mounting or demounting can be completed in one time when the roller system is mounted and replaced, and adjusting operation of the upper roller and the lower roller on a rolling mill rack is simplified.