This article put forward four problems which are deserved to be discussed and clarified in research of urban soil and water loss.The first is that the concept of urban soil and water loss need urgently to be clarified;The second is the suitability that the universal soil loss equation when it is applied to researching urban soil and water loss;The third is that intensity classification of the urban soil and water loss;The fourth is that aspect and character of landforms shaped by constructing of the exploitation construction items.These questions are discussed the oretically

and individual unique viewpoints of the authors are put forward

appealing for strengthen theoretic study on urban soil and water loss.