Low-grade lymphomas are a group of lymphomas with a low degree of malignancy. There are many kinds of lymphomas, some of which develop slowly clinically and pathologically, are not too harmful in a certain period of time, and are clinically classified as low-grade malignant lymphomas, such as follicular lymphoma, chronic lymphocytic leukemia, small B-cell lymphoma, and marginal zone lymphoma. The tumor cells of this type of lymphoma are highly differentiated and close to normal tissue cells, and its grade is low-grade malignant. The growth and development of this kind of tumor is slow, the recurrence rate after treatment is relatively low, and the treatment effect and prognosis are relatively good. Therapeutic drugs include rituximab, vincristine, cyclophosphamide and so on. Therefore, patients with low-grade lymphoma should go to the hospital for examination in time and receive treatment under the guidance of doctors.