In order to improve each public place like dining room, hotel, the shopping mall the massive oily dirt, the fat and other sundry goods disperses into the drainage directly, causes the environmental pollution and the draining water jamming. Because the fat can leave the water saponification to form the hard lump, if fat interception trough has no regular extraction fat hard lump, will then lose the function to become stale or to breed the mosquito, the fly, the cockroach and so on, only depending on the artificial removal by suction, the machinery or the chemical agent, will spend money and also time-consuming. Because includes the enzyme ingredient and the live fungus, can decompose fat and the hard lump, achieves deodorizes and the discharge pipe unimpeded effect.