Numerous different cell groups, such as endothelial cells, pericytes, macrophages, mesenchymal stem cells, smooth muscle cells, and stromal fibroblasts, can be found in the tumor microenvironment Caveolin-1, which is also referred to as caveolin, Cav-1, or VIP21 is a structural membrane protein that has been demonstrated to suppress breast tumor growth and metastasis. Numerous studies have determined Cav-1 as a potential therapeutic target for breast cancer due to its inhibitory effects on cancer-associated pathways. In preclinical studies, expressed Cav-1 has been demonstrated to prevent breast tumor cell invasion, and the lack of stromal Cav-1 is linked to early breast cancer development. According to certain research, Cav-1 may also inhibit the late phase of autophagy via HIF-1 in triple-negative breast cancer. Furthermore, Cav-1 has been demonstrated to prevent breast tumor stem cells' self-renewal ability and aerobic glycolysis activity. These data show that Cav-1 may play an important function in breast tumor inhibition, as a possible target for treatment of breast cancer.