The light chains in myeloma light chain type refer to the peptide chains in immunoglobulin with smaller molecular weight. When myeloma secretes a large amount of monoclonal immunoglobulin, it will reduce the binding and generate too much, which will lead to the obvious increase of light chain in the blood, thus blocking the renal tubules and causing the damage of renal tubular function, and it is the common reason why multiple myeloma is easy to lead to the damage of renal function. It is a common cause of multiple myeloma, which may lead to kidney function damage. In life, patients should pay attention to rest, avoid exertion, exercise properly, and eat more fruits and vegetables to strengthen nutrition and increase resistance. It is suggested that patients should go to the hospital in time to clarify the cause of the disease, and under the guidance of doctors, give corresponding treatment and treatment.