Therefore, we summarize a brief overview of the structure and function of NIX/BNIP3L, as well as the mechanisms of NIX/BNIP3L generation and degradation, the role of NIX/BNIP3L in mediating apoptosis and mitophagy and to advance the understanding of the roles of NIX/BNIP3L in glioblastoma, lung cancer, hepatocellular carcinoma, breast cancer, pancreatic cancer, colorectal cancer and hematologic neoplasms, aiming to enhance treatment precision and improve patient outcomes. Here, BNIP3L is linked to breast cancer.