Waist washwater gutter for denitrification deep bed filter

The invention provides a waist washwater gutter for a sewage treatment filter, and a corresponding filter. The filter comprises an intake tank, a washwater gutter body, a filter material layer, a supporting layer, a gas-water distributing layer and a water producing ditch, which are sequentially arranged from the upper part to the lower part of the filter, wherein the water producing ditch is formed in the lower part of the center at the bottom of the filter; the filter material layer, the supporting layer and the gas-water distributing layer are stacked; the washwater gutter body is arranged at the center position of the waist of a denitrification deep bed filter near the top of the filter material, and separated from the intake tank at the top of the filter. By adopting the waist washwater gutter, the backwashing drainage height is reduced, so that the lift of a wash water pump and wind pressure of a backwashing blower are reduced when the backwashing water is reduced, and the problems that an existing denitrification deep bed filter is much in backwashing water, high in lift of the backwashing water pump, high in air pressure of the backwashing blower, and large in energy consumption are radically solved.