Wastewater separation device

The utility model provides a wastewater separation device which comprises a box body, a partition plate and a grease separation assembly, a box cover is hinged to the upper end of the box body, an inserting hole is formed in the middle of the right side wall of the box body, the partition plate penetrates through the inserting hole to be connected with the front side wall and the rear side wall ofthe box body in a sliding mode, and the partition plate divides the box body into a standing cavity and a water collecting cavity. Gauze is connected between the left end of the partition plate and the left side wall of the box body, a glass window is arranged on the portion, above the inserting hole, of the right side wall of the box body, scales are marked on the glass window from top to bottom, the grease separation assembly comprises a grease pumping box and a grease pumping pipe, a through hole matched with the grease pumping pipe is formed in the box cover, and the grease pumping pipe is inserted into the throu