NOVELTY - Removing landfill gas siloxane comprises e.g. adding landfill gas after pressurizing in gas liquid separator, removing the free water of landfill gas, foam and solid particle, adding landfill gas into the treatment tank, carrying out absorption of sodium carbon solution, removing hydrogen sulfide from landfill gas, passing gas containing siloxane through membrane separation unit for membrane separation, adding processed tail gas into the drying tower filled with calcium chloride, removing water vapor and methane gas, entering into storage tank, and storing methane gas.    USE - The method is useful for removing landfill gas siloxane (claimed).    DETAILED DESCRIPTION - Removing landfill gas siloxane comprises (i) adding landfill gas after pressurizing in gas liquid separator, removing the free water of landfill gas, foam and solid particle, (ii) adding step (i) obtained landfill gas into the treatment tank, carrying out absorption of sodium carbon solution, removing hydrogen sulfide from landfill gas, (iii) passing step (ii) obtained landfill gas containing siloxane through membrane separation unit for membrane separation, dissolution from permeation side permeation from the normal hexane organic solvent effect mixed gas by film separation process unit of hollow fiber film contactor, passing mixed gas through membrane separation unit via hollow fiber membrane contactor, siloxane film yarn internal and external pressure and concentration difference inside and outside film from the permeation side penetrates out into organic solvent hexane, dissolving, recycling silicone, and (iv) adding step (iii) processed tail gas into the drying tower filled with calcium chloride, removing water vapor and methane gas, entering into storage tank, and storing methane gas. An INDEPENDENT CLAIM is also included for a landfill siloxane gas removing device comprising a pretreatment unit, a film separation unit and methane recovery unit, where the pretreatment unit comprises a mist catcher with the gas-liquid separator and absorbing tank, upper gas-liquid separator is equipped with inlet pipeline, connected with feed gas pool; the upper inlet pipeline is mounted with valve; the gas-liquid separator lower part is set with liquid discharging pipe; the drain pipe is equipped with a liquid level control valve; the gas-liquid separator is provided with bottom discharge hole used for periodically discharging the accumulated air storage tank connected with solid dirt at the bottom; the outlet pipeline of gas-liquid separator is provided with de-foaming plate; the upper part outlet of separator is provided with silk screen catcher; the gas mist after entering into outlet through pipeline at outlet pipeline is mounted with pressure control valve; the upper liquid surface gas separator is provided with an absorption tank with sodium carbon solution; and upper pipeline is equipped with valve; the outlet pipeline of the absorption tank is provided with the sodium carbon solution connected with film separation unit; the film separation unit at least comprises two hollow fiber film contactor connected in series; i.e. mutually connected in series the first grade hollow fiber film contactor and the second grade hollow fiber film contactor; the first grade hollow fiber film contactor and the second grade hollow fiber film contactor by connection tube is connected; mounted with valve on the connecting pipe in the first grade hollow fiber film contactor and air inlet pipe and pretreatment unit is provided with absorption tank and sodium carbonate solution; the air inlet pipe is mounted with gas valve; the second grade hollow fiber film contactor by air inlet pipe outlet gas pipe and methane recovery unit is connected; the air outlet tube is installed with gas valve; the first permeation side of second class hollow fiber film contactor through pipeline and vacuum pump are connected; the pipeline is equipped with valve on the outlet line and positive hexane storage tank and vacuum pump are connected; the methane recovery unit comprises a drying tower A and the whole methane tank is filled with calcium chloride; the drying tower inlet pipeline and film separation unit is connected with the second grade hollow fiber film contactor outlet; the inlet pipeline is equipped with valve on the calcium chloride drying tower and outlet pipeline on outlet pipeline equipped with valve.    DESCRIPTION OF DRAWING(S) - The drawing shows a schematic representation of the landfill siloxane gas removing device (Drawing includes non-English language text).