The foam discharging agent composed of oxidation amine (A) and synthetic amphoteric surfactants (B) as the main agent and special surface-active agent (C) as stabilizer was studied. With the Ross-Miles method, using the sparkling height and the fluid volume as evaluation index, the optimal ratio of A, B and C were determined, and the relative properties of foam discharging agent with 8:2:1 of A: B: C, named as FHG-1, were tested. The results indicated that, at the temperature of 30℃, 5 min foam height and fluid amount of FHG-1, was 110 mm and 116 mL in the water containing 20% oil, and was 170 mm and 176 mL in the water containing 20% ethanol, respectively, which indicated that FHG-1 had excellent oil resistance and methanol tolerance ability. In addition, the compatibility of FHG-1 with formation water As a result, the foaming agent FHG-1could be used in the gas well containing oil and ethanol。