Membranous Nephropathy(MN) is a kind of chronic nephritic disease.The peak period of onset is from 30 to 50 years old，and 60% to 80% of membranous nephropathy is characterized by nephrotic syndrome(NS).Idiopathic Membranous Nephropathy(IMN) accounts for about 2/3 of membranous nephropathy.According to the amount of urine protein，it can be divided into three grades:the low，medium and high-risk.TCM holds that “Da Qi” deficiency is the etiology of high-risk IMN，leading “Da Qi” to the pathology of “delay shipment，and do not rise，but not to get together”.Clinical research on the different pathological states of “Da Qi” shows that high-risk IMN from three aspects of “tonifying qi and clearing the source，promoting blood circulation and clarifying the source，and strengthening the kidney and restoring the source”，which has certain guiding significance for clinical practice.