The new situation which we are faced with in coil and water conservation work.in the course of urbanization。was recounted briefly. The characteristics of urbam soil and water loss and its endangers to the urbanization itself and the development of economy were analyzed systematically. Then.the technical line and principal content of urban soil and water conservation work were expounded. -hhe necessity and urgency to prevent soil and water loss in process of urbanization were set forth at last.