Abstract: Based on the adaptability test in the south mountainous area of NingXia, the result of rotating crops effect study indicate that the annual medics of Australia are a kind of good adaptability and quality leguminous forage grass. It gives dependable pledge to different rotating crops since the characteristic of seed dormancy, which can ensure and increase the output of rotating crops. Annual medic of Australia is an important crop for rotating crops, enriching soil, developing stockbreeding, and it should be extended.