Docetaxel is an antitumor agent that promotes the polymerization of tubules into stable microtubules and inhibits depolymerization, thus providing antitumor effects. Docetaxel has a broad spectrum of anti-tumor activity and can be used in a variety of malignant tumors, such as breast cancer, in combination with other drugs, for post-operative chemotherapy for breast cancer patients. In addition, it can also be used for small cell lung cancer, which can be applied to locally advanced or metastatic small cell lung cancer. Besides, docetaxel can also be used for patients with prostate cancer, usually in combination with hormonal drugs for prostate cancer treatment, and this drug can also be used for non-small cell lung cancer, as well as head and neck tumors, and has certain effect on a variety of malignant tumors such as esophageal cancer, ovarian cancer, and gastric cancer. In conclusion, docetaxel has anti-tumor effects.