Efficient filter

The utility model provides an efficient filter which comprises a filter body, a water distribution pipe, an air distribution pipe layer, a perforated plate, a filter cushion layer, a filter material layer and a material leakage prevention device are sequentially arranged in the filter body from bottom to top, a water inlet is formed in the top of the filter body, and a backwashing water inlet is formed in the bottom of the filter body. A backwashing air inlet is formed in one side of the bottom of the filter body; the backwashing air inlet is positioned on the outer sides of the water distribution pipe and the air distribution pipe layer and is communicated with the water distribution pipe and the air distribution pipe layer; the whole anti-material-running device is of a V-shaped structure with an upward opening, and a plurality of water inlet holes are formed in the anti-material-running device. When water is filtered through the material leakage prevention device, the whole vertical section of the filter p