The main body of the high-efficiency inclined tube sedimentation equipment is made of carbon steel and multi-layer anti-corrosion epoxy asphalt paint. The inclined tube component adopts special processing technology, with a utilization rate of 100% and an increased processing capacity. It occupies only a quarter of the area of a horizontal flow sedimentation device, and the sedimentation efficiency can be improved by 3-5 times. During the processing, gravity is used, which does not consume energy and reduces processing costs. The accumulated mud can automatically fall into the mud hopper, making it easier to discharge the mud and reducing the intensity of manual cleaning work. The laminar flow state is good, and the particle settling is not affected by turbulent flow. It has a good effect on some difficult to separate impurities such as colloids When the length of the inclined pipe is 1 meter, the effective load is designed at 3-5 t/m2 · h, and the VO is controlled within the range of 2.5-3.0 mm/s. The effluent quality is good. The inclined pipe sedimentation device uses ethylene propylene copolymer, fiberglass or polyvinyl chloride honeycomb inclined pipes with an inclination angle of 60 ℃, an inclined length of 1 meter, and an inscribed circle diameter ranging from 35-80 mm. The inscribed circle diameter can be changed according to the water quality to achieve sedimentation effect.