Anycast uses BGP to achieve the best path selection by assigning the same IP address to multiple terminal nodes.In recent years, as anycast technology has become more and more common, it has been widely used in DNS and CDN services. This studyfisrtlyintroduces anycast technology in an all-round wayand then discusses current problems of anycast technology and summarizes these problems into three categories: anycast inference is imperfect, anycast performance cannot be guaranteed, and it is difficult to control anycast load balancing. In response to these problems, the latest research progress is described. Finally, the problems in solving anycast problems and the direction of improvementare summarizedtoprovide useful references for researchers in related fields.