Biological aerated filter

The utility model provides a biological aerated filter. A filter material layer, a bearing plate and a filter brick layer are arranged in a filter body of the biological aerated filter in sequence. The filter material layer is provided with filter materials, the bearing plate is used for bearing the filter materials in the filter material layer, the bearing plate is arranged adjacent to the filter material layer, the filter brick layer is used for distributing water and gas, the filter brick layer is composed of a plurality of filter bricks which are laid flatly, the filter brick layer is arranged adjacent to the bearing plate, the filter material layer, the bearing plate and the filter brick layer are adjacently arranged in sequence from top to bottom, and the filter brick layer is arranged adjacent to the filter bottom of the filter body.