The use of inclined tube sedimentation device refers to a sedimentation device with inclined tubes installed in the sedimentation zone. In the sedimentation zone of a horizontal or vertical flow sedimentation device, inclined parallel tubes or honeycomb shaped inclined tube fillers are used to divide into a series of shallow sedimentation layers, and the treated and settled sediment moves and separates from each other in each shallow sedimentation layer. The inclined tube sedimentation device has the advantages of high sedimentation efficiency, stable treatment effect, short residence time, small volume, less land occupation, and easy operation. Therefore, it is widely used in the removal of suspended solids and other solids in water supply and sewage treatment.