Wastewater treatment system for building

The utility model discloses a waste water treatment system for building, which comprises a filter box body, the top end of the filter box body is fixedly connected with a waste water injection nozzle, a positioning connection sliding plate is slidably installed on the box wall on one side in the filter box body, and one side of the positioning connection sliding plate far away from the inner wall of the filter box body is fixedly connected with a garbage filter screen. A guide connecting plate is fixedly connected to the end, away from the positioning connecting sliding plate, of the garbage filter screen, a fixed connecting plate is rotatably connected to the bottom end of the guide connecting plate, a supporting connecting body is fixedly connected to the bottom end in the filter box body, and a drainage groove is formed in the top end of the supporting connecting body. According to the device, waste water carrying organic garbage enters the filter box body through the waste water injection nozzle, passes t