Double-layer high-efficient filter

The utility model relates to a double-layer high-efficient filter, comprising a filter body, three pebble filtering layers, a high-efficient rapid fiber-ball filter material layer and a suspension-type biological plastic packing layer without excess sludge, wherein the filter body is provided with a water inlet, a cleaning valve, two seal doors and a water outlet. The filter body is divided into two filtering units by the three pebble filtering layers between the water inlet and the water outlet. The high-efficient rapid fiber-ball filter material layer is arranged in the first filtering unit, and the suspension-type biological plastic packing layer without excess sludge is arranged in the second filtering unit. The two seal doors are respectively arranged on the first filtering unit and the second filtering unit.