Anlotibib (ALTN) is a kind of innovative medicines approved by State Food and Drug Administration（SFDA） which was researched by Jiangsu Chia-tai Tianqing Pharmaceutical Co., Ltd. ALTN is a kinase inhibitor of receptor tyrosine with multi-targets, especially for VEGFR2 and VEGFR3. It has the obvious resistance to new angiogenesis. The trial is to explore ALTN for the effectiveness of advanced medullary thyroid carcinoma and security.