The size of gas flow ratio in drive process directly affected the sweep efficiency of sweeping phase and oil recovery. The special methods，which could control mobility in the process of gas flooding，included the thickening and tackifying supercritical CO₂ system，gas-soluble surfactant，emulsion of supercritical CO₂，water-gas dispersion system and micro-foam（bubble） . The control mechanism and research progress of the five methods were introduced，and the characteristic of each method was analyzed. The related research direction and application prospects were discussed，which might provide reference for the related research of mobility control of gas flooding.