Filtering clarification device

The utility model relates to a filtering clarification device used in sewage treatment facilities adopting biochemical technology. The filtering clarification device is a container formed by four boundaries and a bottom surface. The first boundary is opposite to the second boundary, and the third boundary is opposite to the fourth boundary. The first boundary and the second boundary are vertical boundaries, and the third boundary and the fourth boundary both inclines inwards from top to bottom, so that the lengthwise section of the container is trapezoid. A sludge backflow pipe communicated to the outside of the filtering clarification device is arranged at the bottom of the third boundary, and a sludge inlet is arranged at the bottom of the fourth boundary. A baffle diversion trench is fixedly arranged at the top of the filtering clarification device, and a clear water overflow weir is arranged in the baffle diversion trench in a dividing way. The filtering clarification device has the characteristics of bei