Abstract: The hot deformation behavior of super duplex stainless steel S32750 was investigated through MMS-200 thermal-mechanical simulator within 1000~1150°C and the strain rate range of 0.01~10 s^-1. The corresponding flow curves were determined and the microstructures were analyzed. The results showed that peak stress increases with the increasing strain rate. Dynamic recrystallization of austenite is enhanced by increasing temperature and decreasing strain rate. Based on the constitutive equation for hot deformation, the apparent activation energy (Q) of the steel is 460 kJ/mol. According to the present experimental data, the relationship between peak stress and Z parameter is obtained.