Abstract: In the last few years, scientific research and controlling practices on the problems of desertification strengthened furtherly the concrete theoritical researches on the issues and provided a good foundation for the detail rec g-nization of the importance of the worldwide concerned problem. It is attempted to discuss the ecological principles of desertification process and its rehabilitating measures, and it is expected to evoke a heated discussion and bring relevant scientists' attention and interests on the problem, with the presentation of superficial opinions, and benefit from different viewpoints on the disasters. Definitionally, desertification resides its meaning in the network of alternative interactions amongst natural environment, biology and human society and the desertification is originated in the processes of dislocation of the interrelation among above-mentioned three aspects. The discussion of the ecological principles of desertification deals with a) ecological mechanism of the crigination of desertification; b) ecological property of desertification process; c) ecological evaluation of the developing degree of desertification; and d) ecological engineerings for rehabilitating land desertification.