本文对膜法富氮过程进行了理论分析，建立了分离过程的数学模型，并用实测值进行了验证。同时在计算机上考察了膜性能参数及操作条件对富氮浓度及回收率的影响。 In this paper, the membrane nitrogen enrichment process was analyzed theoretically, the mathematical model of the separation process was established and verified with the measured values. At the same time, the effects of membrane performance parameters and operating conditions on nitrogen-enriched concentration and recovery rate were investigated on the computer.