American focus on critical infrastructure security long-standing. In 1990s, 62, 63 executive orders issued laid the foundation America critical infrastructure protection system of legislation, policy. After 9.11 incident, America has promulgated many laws, national strategy, executive orders to improve critical infrastructure, legal policy, security system, and gradually formed a perfect system, accountability unity, distinct critical infrastructure security system. Critical infrastructure protection concept is clear, the protection mechanism of the division of labor between the more reasonable, perfect protection framework tends to become a prominent feature of this period America critical infrastructure protection legislation, policy protection system.