Whether purpura nephritis grade 3b affects life expectancy is related to patients’ treatment and treatment compliance, such as untimely and irregular treatment will affect their life expectancy, on the contrary, it will not affect life expectancy. 1. Purpura nephritis grade 3b is more serious, but early receiving hormone combined with cyclosporine, cyclophosphamide and other drugs regular and sufficient course of treatment, its prognosis is better, will not affect the life expectancy. 2. If the treatment of purpura nephritis grade 3b is not timely and thorough, it can develop into renal insufficiency, or even uremia stage, which will have a certain impact on life expectancy. Purpura nephritis grade 3b is clinically more serious, patients may have symptoms such as arthritis swelling and pain, seriously affecting their work and life, and even jeopardize the life and health of patients, it is recommended that the patient should seek medical treatment in a timely manner, to receive regular doctors to improve the prognosis, do not neglect, so as not to delay or aggravate the condition.