For renal tumors of 3-4 cm in size, it is usually necessary to remove the renal tumor after blocking the renal artery on that side, and then suture the renal incision. Prof. Shen Zhoujun, who has had nearly 700 robotic laparoscopic surgeries, is highly skilled. Recently, some tumors are resected without blocking the renal artery. Maximum protection of renal function. This technique has not been reported internationally.