The defense advanced research projects agency （DARPA） seeks to transform from a kill chain to a kill web and intends to construct a highly decentralized kill web to create an unpredictable kill chain through information networks. Under the test flag system， U.S. air force has conducted “orange flag” “emerald flag” and “black flag” tests to promote the application of the kill web concept. Firstly， based on the kill web combat concept， the connotations and differences of the kill web and kill chain are summarized. Secondly， the development background of the “adaptive cross-domain kill webs” program of DARPA is clarified， and its architectural design based on the “supplier-consumer” framework of E-commerce is analyzed. The key technical demonstrations of the program supported by the “anytime reasoning and analysis for kill-web negotiation and instantiation across domains” software are summarized. Thirdly， the key technologies required for kill web are proposed from the aspects of combat management， system architecture， secure communication， infrastructure， and standard specifications. Finally， in view of constructing a resilient kill web for the Chinese military’s defense combat， some suggestions on the construction of a Chinese air defense combat equipment system are given from the technical perspective.