The invention discloses an inorganic membrane advanced treatment device for submarine gas field gas condensate sewage. The inorganic membrane advanced treatment device is mainly composed of a raw water tank, a raw water pump, a plurality of groups of membrane filter units, a liquid discharging pump, a concentrated liquor recovering tank, a washing tank and a washing pump, wherein the raw water pipeline is connected with a concentrated liquor pipeline after being connected with the plurality of groups of membrane filter units in parallel; the concentrated liquor pipeline is respectively connected with the top of the raw water tank and the concentrated liquor recovering tank; a raw water inlet valve, a raw water outlet valve and a membrane filter unit bypass valve are respectively arranged between each group of membrane filter units and the raw water pipeline; the top of each group of membrane filter units is connected with a top discharging pipeline, and the top discharging pipeline is connected with the raw water tank and the washing tank. The invention also discloses an application method of the inorganic membrane advanced treatment device for the submarine gas field gas concentrate sewage. By adopting the inorganic membrane advanced treatment device, the gas concentrate sewage treatment effect can be guaranteed, the structure of the device is simplified, the treatment cost is reduced, and the gas concentrate with high additional value is recycled.