Abstract: Because of the restriction of the base condition of radar, and the variation of the applied aims and conditions, and so on, the adaptability of radar was required further when the mission was executed. The muhi-mission adaptability of radar was induced preliminary in this article, and the structural characteristics of the multi-mission radar was colligated in brief, predominance was decomposed concisely, the foreground was also confirmed that enhancing the adaptability in the development of modern radars.