Abstract: According to the principle of filling modification,analysis and evaluation of the performance of the rubber tube by the orthogonal experiment method were made,and the optimal ratio of multivariate composite material used for high temperature and high pressure was determined. The results of indoor experiment and field test show that trubber tube with the optimal ratio can withstand 350 ℃ of high temperature steam injection and 20 MPa of steam injection pressure,meeting the requirments for sealing of the heavy oil thermal recovery wells during steam injection production for superheated or supercritical steam.