Abstract:Key information infrastructure is the nerve center of economic, social operation and the top priority of network security. As one of the key industries of key information infrastructure, water conservancy must implement the requirements of the regulations on security protection of key information infrastructure. This paper briefly introduces the identifification rules of water conservancy key information infrastructure, analyzes the security status of water conservancy key information infrastructure, puts forward to strengthen systematic construction and build a comprehensive security defense system of water conservancy key information infrastructure, based on the actual combat, adhere to promoting defense with attack,by implementing normal operation and improving daily protection ability. Through systematic construction, actual combat defense and normal operation, we can realize dynamic defense, active defense, defense in depth, accurate protection, overall protection, joint defense and joint control so as to ensure the safety of water conservancy key information infrastructure.