Abstract: The simulation on temperature and rolling force of 68 mm slab of 0. 19-0. 20C steel during 6 passes rolling of compact strip production (CSP) process has been carried out by commercial software Marc with heavy deformed elasticplastic thermal-mechanical coupled finite element method to analyze distribution and change of temperature and rolling force of workpiece at each pass in rolling process. Results show that during deformation of workpiece, contact heat conduction and deforming heat are main factors to influence temperature change, and both combined effects determine the law of temperature change of work piece during deformation process ； there is an obvious temperature gradient from surface to centre with certain depth of workpiece, and beyond the critical depth, the temperature of workpiece maintains constant ； and the rolling force keeps little variation during stable rolling stage.