Roof wastewater treatment device for building

The invention relates to a wastewater treatment device, in particular to a roof wastewater treatment device for a building. The roof wastewater treatment device for the building is suitable for common families, low in manufacturing cost and convenient and fast to install. The roof wastewater treatment device for the building comprises a supporting frame, an enclosure frame, a water receiving opening, a main filter plate, auxiliary filter plates and small rotating plates; the enclosure frame is arranged on the supporting frame; the water receiving opening is formed in the top of the enclosure frame; the main filter plate is arranged on the upper side in the enclosure frame; the auxiliary filter plates are rotationally arranged on the two sides of the main filter plate; and the two small rotating plates are rotationally arranged on the lower side of the interior of the enclosure frame. By arranging a primary mechanism, the main filter plate and the auxiliary filter plates, waste water flowing down from the wate