Abstract: The activity of fighting against SARS demonstrates the might of the Mobilization of National Economy. Practice has proven that Mobilization of National Economy is a very important means of national security. This paper analyses the Mobilization in fighting against SARS from 9 aspects, and from the angle of national security, it calls on people to use this opportunity of building up Emergency System to promote all kinds of national security preparation of Mobilization and make it an all-round Mobilization under the name of national security.