By analysing and discussing on some related scientific discoveries and rsearch work now available, the origin of the life on the earth is studied tentatively in this paper, based on the relations among Astronomy, Geology and Biology. The author has proposed a new hypothesis for the origin of the life on the earth: the life on the earth originated during the earth s forming process. That means the life and the earth had the same origin. The Life began at the dust cloud stage before the earth had formed. The ...