Rice starch stearate was prepared by drum dryer with rice starch as raw material,stearic acid as esterifying agent.The properties such as viscosity,emulsifiability,transparency and freeze-thaw stability were also investigated.The structure of rice starch stearate was detected by FTIR spectrum and XRD.The results show that after modifying,starch viscosity and freeze-thaw stability decreased,transparence and emulsifiability were improved.FTIR revealed that it is feasible to prepare rice starch stearate by drum dryer.Starch crystalline structure was destroyed after being modified.