Abstract: The thermal recovery is a common and effective method for producing heavy oil. The casing failure is a very serious problem in thermal recovery wells. In view of this problem, it is proposed the technique of casing cementing with internal pre-expansion for thermal recovery well. It refers to exert inner pressure on payzone production casing or heat payzone production casing to a certain temperature and make payzone production casing expand in cement solidifying period. We developed simulating experiment table according to field practice and pre-expansion cementing theory. It can simulate cementing technology including conventional, half warm-up and internal pressurization cementing technology, as well as steam injection and production process. The technique will be an important foundation for the following field tests and its application.