Objective To investigate the clinical applicated value of simple transumbilical single-tunnel laparoscopic renal cyst decortication.Methods 7 patients with renal cysts were treated with simple single-tunnel laparoscopic renal cyst decortication.Results The operations of 7 patients were succeed.The mean operative time was 37 (28 ~ 90) min,and the mean time of pulling the drain tube out was 2 (1 ~ 4) d,and the mean int aoperative blood loss was 30 (25 ~ 80) ml,and the mean bed stay was 1.5 (1 ~ 3) d,and the mean hospital stay was 4 (3 ~ 8) d.In 7 patients,no recurrence of the cyst occurred during a follow-up of 1 ~ 6 months by color-ultrasonography,CT after operation.Conclusion The simple transumbilical single-tunnel laparoscopic renal cyst decortication has advantages of economic,minimal trauma,hairdressing,rapid recovery and better effect,therefore it maybe an ideal treatment choice for renal cysts.