Helicopter-borne AAM is the primary weapon of the armed helicopter to control of the low-altitude air. The compatibility between helicopter and helicopter-borne AAM is required study as emphases. Established the 6-DOF model and the ejecta model of AMM. Simulated, computed & researched the whole process of AAM launch from helicopter, it include movement on track, guise of slide away, initial trajectory, plume and ejecta. Through the study, found the conclusion that the compatibility between one type helicopter and the AMM is well. Another, in order to avoid going down of the initial trajectory, to table a proposal for the design of the thrust deflection.