The force produced by vertical ejecting mechanism is large and lasts for a short time when the carrier aircraft ejects missile in supersonic flight, because the turbulence caused by the force is big, it will disturb safe separation. In order to research the dynamic response under the turbulence, a dynamic model which describes a supersonic free flight carrier aircraft was established and the model was proved to be reasonable and available. A suit of vertical ejecting mechanism was designed for the carrier aircraft simultaneously. The results of the research show the ejecting force has some effect on the carrier-aircrraft, but affects the initial velocity of the missile distinctly. The change of the location of the vertical ejecting on the carrier-aircraft produces obvious effect on the carrier aircraft's movement. The multi-rigid-body vertical ejecting mechanism can eject missile according to request.