Abstract: Industrial experiments of Q235 plain carbon steel by Accumulitive Roll-Bonding (ARB) process were carried out. The effects of deformation temperature, reduction (the max reduction 98%) and cyclic roling pass on the microstructure and mechanical properties of the steel were investigated. The results showed that a steel with ultrafine grains and higher mechanical properties could be obtained on a plain hot rolling mill by ARB process. It was also proved that the interracial microstructure was continuous and homogeneous because of the same material rolling.