Abstract: Prepare the microporous structure of expanded polytetrafluoroethylence material, using the pore-forming agent method. Study the effect of pore-forming agent treatment on the compressibility and recovery of polytetrafluoroethylence. It showed that the density and hardness of polytetrafluoroethylence decreased, while the porosity increased with the increase of processing content pore-forming agent. Compressibility and recovery of polytetrafluoroethylence vary with different kind of pore-forming agent.