NOVELTY - Biological treatment system quick building method comprises adding combined packing into sequencing batch biomembrane reactor and inoculating the activated sludge; calculating the inflow water and controlling the aeration volume in first stage; introducing water, precipitating and discharging; screening out halophilic bacteria in the reactor, and making the microorganism grow on combined packing in attachment mode to form compound microecology biomembrane; and adopting second stage of salt content lift method, and gradually increasing the salt content in the reactor.    USE - Method for quickly building biological treatment system for wastewater with high salt content.    ADVANTAGE - The method makes the activated sludge in the reactor grow in attachment mode in the environment with salt content of 3% (counted by NaCl) on the condition of no halophilic bacteria. In this way, the method builds a compound microecology biomembrane treatment system suitable for the growth of microorganism with target salt content.    DETAILED DESCRIPTION - Biological treatment system quick building method comprises:    (A) adding combined packing into sequencing batch biomembrane reactor as carrier to which the microorganism is attached, making the biomembrane form a density, particularly a packing ratio of 30-50%, inoculating the activated sludge, fixing inoculation volume V1, and making the sludge concentration in inoculated reactor be 8-10 g/L;    (B) making the inflow organic load be 0.5-1.0 kg chemical oxygen demand (COD)/m3.day, calculating the inflow volume V2 in each period according to the load and the inflow COD concentration in first stage, determining the volume V3 of water to be added such that the organic volume V' of sequencing batch bio-membrane reactor is equal to the sum of V1, V2, and V3, and adding sodium chloride (NaCl) to make the initial salt content in the reactor be 3%;    (C) controlling the aeration volume, keeping the content of dissolved oxygen (DO) in the reactor at 5.5-6.0 mg/L, maintaining the water temperature at 25-30 degrees C, performing the first stage of operation of the reactor with one day as one period on the condition that the inflow salt content is 3%, performing water intake for 0.15-0.25 hours, reacting for 23.5-23.7 hours, precipitating and discharging water for 0.15-0.25 hours, totally taking 24 hours, in the first stage of operating process, using the sequencing batch biomembrane reactor to screen out halophilic bacteria in inoculated activated sludge with critical salt content of 3% so as to make the halophilic bacteria become dominant bacteria, and making the microorganism grow on combined packing in attachment mode to form compound microecology biomembrane, improve the sedimentation performance of sludge and increase the system capacity of resisting salinity impact;    (D) determining the exact time according to the discharge COD after operating for 10-15 days on the condition that the inflow salt content is 3% in the first stage, adopting the second stage of salt content lift method capable of changing the inflow salt content, and gradually increasing the salt content in the reactor until meeting the target salt content to quickly build the microorganism treatment system on the condition of high salt content, particularly the target salt content; where in the second stage of salt content lift method, the salt content in the reactor is increased through changing the inflow salt content of the second stage; the inflow salt content in the second stage is the target salt content; the salt content in the reactor is gradually increased through receiving the wastewater with target salt content and discharging the wastewater whose salt content is 3% to target salt content until meeting the target salt content.