Abstract: Breast cancer is a highly prevalent malignant tumor among women worldwide, and radiation therapy plays a key role in its treatment process. With the rapid development of artificial intelligence (AI) technology, its application in the field of breast cancer radiotherapy has become more and more extensive and in-depth, which has brought new opportunities to improve the treatment effect and optimize the prognosis assessment. Existing research demonstrates that artificial intelligence technology plays a crucial role in medical image processing and automated radiotherapy planning for breast cancer radiation therapy. By systematically reviewing relevant research findings and practical advancements while identifying key technical challenges, this work will provide effective support for the deep integration and development of artificial intelligence in breast cancer radiation therapy.