Abstract: According to the characteristics of terrigenous lithostratigraphic records,the terrigenouslithostratigraphic structure is composed of four descriptive elements,j.e. :bed,bed set,essentialsequence and essential sequence set. The concept of the terrigenous lithostratigraphic structuresubstantiates the content and connontation of the lithostratigraphic units and can help to describeterrigenous lithostratigraphy better.