Reseaech on integrated therapy of traditional Chinese medicine for membranous nephropathy

INTERVENTION: Treatment group:Integrated therapy of TCM;Control group:Prednisone and CTX; CONDITION: Idiopathic membranous nephropathy PRIMARY OUTCOME: 24hours urinary albumin, creatine and serum albumi;Blood, stool and urine routine, liver function and ECG;Serum lipid, glomerular filtration rate, and renal biopsy; SECONDARY OUTCOME: Renal funtion and TCM symptoms and sign; INCLUSION CRITERIA: 1. The patient is diagnosed with idiopathic membranous nephropathy by renal biopsy; 2. Age 18 75years, without gender or nation restrict; 3. CKD <=Phase 3 (GFR>30ml/min), 24h urinary albumen >=3.5g.