Patients with chronic renal failure generally have anemia combined with stage three or above of chronic kidney disease (CKD). When the hemoglobin falls below 100 grams per liter, it is necessary to start treatment to correct anemia. At this point, relevant lab tests should be conducted to check for abnormalities in folate, vitamin B12, ferritin, and serum iron levels, and specific treatments should be administered accordingly. Treatments generally include iron supplements, erythropoiesis-stimulating agents, folate, and vitamin B12 to help correct anemia.