How long can chronic renal insufficiency patients live is mainly related to the severity of the patient’s condition, treatment and individual factors, and should be analyzed specifically, not a generalization. If the patient is chronic glomerulonephritis resulting in chronic renal insufficiency, in the early stages of timely and clear diagnosis and standardized treatment, the prognosis is relatively good, generally can maintain stable kidney function for life, does not affect the survival period, the patient can achieve long-term survival. However, if the patient is diabetic nephropathy or vasculitis-related renal failure, usually combined with multi-system lesions, the prognosis is relatively poor, the specific survival time varies from person to person, and some patients can survive 20-30 years. Therefore, patients with chronic renal insufficiency need to pay attention to the timely treatment of the primary disease, diet should try to choose low protein starchy foods, such as yams, potatoes, pumpkin, vermicelli, etc.