Objective To inquire into the diagnosis and management of renal angiomyolipoma.Methods The 22 cases of RAML were studied restrospectively.Results The diagnosis accuracy was 54.5% for B ultrasound and 81.8% for CT,18 were diagnosed as RAML and 4 were misdiagnosed as renal cell carcinoma preoperatively,of which 3 were diagnosed as RAML based on intraoperative frozen section study.11 had been performed enuoleation,7 partial nephrectomy,3 nephrectomy and 1 radical nephrectomy. Conclusions CT is the first line imaging method for RAML.the cow fatty component,intratumor hemorrhage and small tumor are the main canse of misdiagnosis in RAML.careful analysis to clinical feature and imaging data,intraoperative frozen sect,ion study can avoid misdiagnosis.nephron sparing surgery is the best operative management.