Abstract
Breast cancer occupies the first place in the occurrence of female malignant tumors. Connexin 43 (Cx43) has abnormal expression in breast cancer, and plays a role in the occurrence and development of breast cancer. This article mainly discusses the research progress of Cx43 in breast cancer, and discusses its expression in normal breast tissue, primary breast cancer and distant metastasis, so as to provide new ideas for the treatment of breast cancer.