NOVELTY - Separating and purifying gas-phase-liquid phase absorbing film, comprises: (a) pressurizing the mixed gas to the front film pressure and then conveying into the film separator; (b) permeating the matters in the mixed gas through the separating film layer and then dissolving in the liquid phase absorbing agent; and (c) heating the liquid phase absorbing liquid to the gas de-sorption temperature; and then circularly using the liquid phase absorbing agent.    USE - The method and device are useful for separating and purifying gas-phase-liquid phase absorbing film (claimed).    ADVANTAGE - The method is low cost, high in separating efficiency and high in purity of separated gas; when gas phase and liquid phase are separately operated and separated, no secondary pollution will be produced, so that it is particularly applicable to separating and removing carbon dioxide (CO2) and hydrogen sulfide (H2S) gas in petrochemical gas, burned flue gas and marsh gas.    DETAILED DESCRIPTION - Separating and purifying gas-phase-liquid phase absorbing film, comprises separating and purifying the mixed gas according to different permeation speeds of the film material to different matters and the different solubilities of the film permeated lateral matter to different matters; the steps are as follows: (a) pressurizing the mixed gas to the front film pressure which is 0.1-1.0 MPa and then conveying into the film separator; (b) permeating the matters in the mixed gas through the separating film layer and then dissolving in the liquid phase absorbing agent; maintaining the gas with poor film permeation and small solubility in the gas phase side to concentrate; and (c) heating the liquid phase absorbing liquid to the gas de-sorption temperature or depressing or pressurizing according to property of the gas so as to remove the absorbed gas out of the liquid phase absorbing liquid; and then circularly using the liquid phase absorbing agent. An INDEPENDENT CLAIM is a device of separating and purifying method of gas-phase-liquid phase absorbing film, comprising a press machine connected with the gas phase inlet of the film separator so as to pressurize the mixed gas; gas phase outlet of the film separator being connected with a gas storage tank for storing the purified gas; the film separator being a shell inside which is separately installed with the separating film components; middles of the components being liquid cavities in which the liquid phase flows; a liquid phase absorbing agent processor whose one end is connected with the liquid phase absorbing agent outlet of the film separator while the other end is connected with the liquid phase absorbing agent regenerating tower; where the liquid phase absorbing agent processor can be used to heat, pressurize or decompress the liquid phase absorbing agent; top of the liquid phase absorbing agent regenerating tower is installed with a gas outlet and the lower part is installed with a liquid phase absorbing agent outlet; a circulating pump which is connected with the liquid phase absorbing agent outlet and the liquid phase absorbing agent inlet of the film separator.