Abstract: The effects of three rolling processes,including as rolling(AR),controlled rolling(CR)and thermo-mechanical control processing(TMCP),on microstructure and mechanical properties of EH36 ship plate steel were studied by means of mechanical property tests and microstructure observation.The results show that the offects of the three rolling processes on tested steel strength were slight,but significant on low temperature impact toughness.The tested steels produced by CR and TMCP had better low temperature impact toughness than by AR which could not meet the national standard.The strength and toughness of the tested steel produced by TMCP process matched well due to the uniform microstructure and refined grains.