CAR-T, a new technology for cancer treatment, refers to chimeric antigen receptor T-cell immunotherapy (CAR-T), which is an oncology immunotherapy method that achieves the purpose of precision cancer treatment by engineering human T-cells. CAR-T cell therapy is an in vitro method of using genetic engineering to modify the patient’s peripheral blood T-cells, endowing the T-cells with the characteristic of targeting and recognizing tumor cell surface antigens, and then infusing them back into the patient’s body after in vitro expansion and culture to treat tumors. CAR-T cell therapy is mainly focused on hematological tumors, such as acute leukemia, multiple myeloma, lymphoma, etc., but there are still some dilemmas in the treatment of solid tumors. CAR-T cell therapy and novel technologies based on CAR-T cell therapy both have very great application prospects, and through continuous optimization, they will bring hope to more patients and improve the quality of human life. If you need to undergo CAR-T therapy, please go to a regular hospital in time to avoid delaying your condition.