On the basis of research of the mass, heat transfer process and the chemical dynamics in Singlet Oxygen Generator(SOG), a rotating disk type SOG was developed and used for a high power supersonic Chemical Oxygen-Iodine Laser (COIL). The results show that the partial pressure of O2(1D ) can reach to 333.3~519.9Pa, the concentration of O2(1D ) is up to 50%~68%, chlorine utilization is greater than 90% and the content of H2O in gas flow is less than 10%.