There are already several documents on cooperative launch at home,and this paper focuses on this subject from a new perspective.The earliest public documents on cooperative launch from abroad are introduced,and the contents in these documents are analyzed.The following conclusions can be obtained from the analysis:1) Several technical details on cooperative launch may be omitted or fuzzified in those foreign documents;2) From the definition,it can be seen that the cooperative launch technology effectively enlarges the A pole of the missile rather than the F pole stated in the foreign documents;3) It is necessary to distinguish the technology of separate mutual support,which was put forward together with cooperative launch in those foreign documents,and attach importance to this technology,because it is more than a supporting technology of cooperative launch;4) Although the two tactics of cooperative launch and separate mutual support are devised to develop the inter-aircraft data link,we definitely should not ignore the fact that the guidance data link can be used for guidance by other aircrafts,which is not mentioned in the references;and 5) We should not only focus on the development background,application background and application scenario of cooperative launch,but also consider the potential changes that may occur due to condition change.