The invention discloses a treatment system for fire-flood exhaust gas, and relates to the field of oil production engineering. The treatment system for the fire-flood exhaust gas comprises a drying unit, a desulfurization unit, a pressurization unit, a tank body, a gas separation device and a gas storage unit; the drying unit at least comprises a drying device; the desulfurization unit is connected with the drying device and at least comprises a first desulfurization tower and a second desulfurization tower which are in series connection with each other; the pressurization unit is connected with the desulfurization unit and used for pressurizing gas discharged by the desulfurization unit, and at least comprises a first pressurization device; the tank body is connected with the pressurization unit and used for accommodating the gas pressurized by the pressurization unit; the gas separation device is connected with the tank body and used for separating nitrogen and carbon dioxide in thegas; the gas storage unit is connected with the gas separation device and used for storing the nitrogen and/or the carbon dioxide. The treatment system for the fire-flood exhaust gas can solve the problem of exhaust gas emission in the process of fire-flood oil production.