Abstract: During the development process of super-thick heavy oil reservoirs,the oil layers producing degree is seriously imbalanced,the steam channeling phenomenon is outstanding,and the development effect is poor.Therefore,combining with the super-thick massive heavy oil reservoir characteristics of Liaohe oilfield,the technology research of high temperature profile control has been carried out,and the profile control agent formula has been determined.Field test show that the developed high temperature profile control agent can block the high permeability reservoir,at the same time the injected oil displacement is good for low permeability reservoirs and can reach the purposes of improving the steam absorption profile,enhancing the reservoir longitudinal producing degree and improving the steam stimulation effect.