Minimally invasive surgery for kidney cancer usually takes about 2-4 hours to do, which needs to be judged according to the size of the tumor and surgical method, if the tumor is bigger, the time may be longer, if the tumor is smaller, the time may be around 2 hours. Kidney cancer is a common malignant tumor in urinary system, usually originated from the epithelial cells of urinary blood tubules in kidney parenchyma, and it may have symptoms such as hematuria, back pain, etc. Minimally invasive surgery for kidney cancer is usually used for tumors less than 4 centimeters, and if it is more than 4 centimeters, minimally invasive surgery is not recommended, and it may lead to a higher chance of recurrence. Kidney cancer patients should pay attention to light diet, eat less spicy and stimulating food, eat more fresh fruits and vegetables, pay attention to nutritional supplementation, take rest and have regular rechecks.