Fengshen 1 condensate gas reservoir with low permeability has complex geological and phase characteristics such as low permeability，easy sand production，and extremely high content of condensate oil. Therefore，retrograde condensate pollution is inevitable during development. It is essential to clarify the retrograde condensate pollution characteristics and establish pollution relief measures. In this paper，experiments about retrograde condensate pollution characteristics and relief measures were conducted. The results show that the effective permeability of the gas phase in long cores is decreased by more than 90% under the maximum retrograde condensate pressure of 19 MPa. Fracturing can improve the effective permeability of the gas phase in long cores，but the degree of retrograde condensate pollution has not been significantly improved. For the single injection medium，CO₂ injection has a significantly better effect on relieving retrograde condensate pollution than methanol injection and associated gas injection. The mixed medium of methanol and CO₂ in equal proportion has a better effect on relieving retrograde condensate pollution than a single injection medium，and it is the optimal choice. As for the injection timing，the maximum permeability recovery rate of fractured long cores after injecting CO₂ at 19 MPa is 61.18%. Then the condensate oil recovery can reach 36.2% when the injection pressure reaches the abandoned pressure，which is 4.9% higher than that at 5 MPa and 7.8% higher than in the depletion process. As a result，it is the relatively optimal injection timing.