Usually renal cyst 7cm needs surgical treatment. Renal cysts are benign lesions of the kidney, usually cystectomy or even nephrectomy should be considered for patients with huge cysts with a volume of >500ml, malignant tendency or recurrence after puncture. Currently the cyst is 7cm and there is a risk of cyst infection, rupture and bleeding. Once rupture occurs, the patient’s life may be jeopardized by hemorrhage. If serious infection occurs, it will also affect the kidney function. Therefore, kidney cyst 7cm needs to be treated with surgery as soon as possible. Therefore, patients with renal cyst 7cm are advised to go to regular hospitals in time, cooperate with doctors to complete the relevant examinations, and actively deal with it under the guidance of doctors.