There are 3 cysts of 1.46×1.64cm in size in the left kidney, if there is no comorbidity, only need to observe and follow up, if there is hemorrhage, infection and other complications, surgical treatment can be used. 1. Observation and follow-up: renal cysts are a common benign disease occurring in the kidneys, most of them have no clinical symptoms and generally do not require treatment, but only need to follow the doctor’s instructions within a specified period of time for observation and follow-up. 2. Surgical treatment: Surgery can be used when renal cysts have bleeding, infection, rupture or compression and other comorbidities. There are three kinds of treatments: transabdominal open cyst decapitation, laparoscopic cyst decapitation and ultrasound-guided puncture tube injection of sclerosing agent. Therefore, patients with three 1.46×1.64cm cysts in the left kidney should go to the hospital in time and choose the appropriate treatment plan under the guidance of the doctor to avoid the progression of the disease.