Abstract: BGP is one of the most widely used Inter-domain Routing Protocol nowadays, but the routing anomaly disturbs the normal protocol behaviors badly. By making use of network resource existed, the monitor of Inter-domain Routing System doesn’t need to change any protocols in existence, so it can be easily expanded and deployed. Detecting Engine for BGP anomaly plays an important role in BGP routing monitoring. We adopt the dynamic forming technique of detecting-links to get a well expansibility on detecting types in Single-View, and propose a BGP anomaly detecting algorithm based on multiple views, which can increase the efficiency by looking for related result-set and accelerating the search speed based on the index of views. The experiment results show that the engine performs well in the detecting based on topology and routing states, and get a preferable effect on MOAS conflicts detecting.