The utility model relates to a waste water treatment unit filler or filter material device, which comprises at least one filler frame, a water distributing bottom plate which is arranged on the bottom part of the filler frame, and a water inlet and a water outlet which are arranged on the filler frame, wherein the water distributing bottom plate is provided with holes. When the utility model is used, filler or filtering materials are filled into the unit device after uniformly mixed, which ensures various types of the filler or the filtering materials sufficiently contact the waste water to ensure reacting effects. When the utility model is worked, the refilling or replacement of the filler or the filtering materials can be realized by that the unit device is only hung from a reacting tank. When aeration devices which are arranged on the bottom part of the reacting tank need to be repaired, the unit device is only hung out. The utility model adopts an upwards flowing form, a sludge bed is formed on the lower part of the utility model, acidizing sludge can be formed inside the tank and the utility model has the double actions of hydrolysis and trapping for the organic matter. The device can carry out internal reflux and has the advantage of good processing effect. Because the utility model is provided with air pipes, the utility model can be termly back washed to effectively prevent unit filler layer or filter material layers from being clogged.