Ground freezing fog simulation technology can generate icing condition for commercial or military aircraft nacelle anti-ice system performance evaluation under -1 ~ -9益. Purity of water and air used for fog generating is the precondition, icing parameter is impacted by diff-pressure of liquid-gas, wind tunnel velocity and distance between test article and test rig. Rectified FM-100 sensor can be used for icing parameter measurement, rig lift, small angle pitching and universal mechanical structure design make the fog simulation rig can satisfy the requirements of different test articles and wind directions.