NOVELTY - Automated excrement collecting catch basin tank comprises a toilet sewage discharge sewer pipes of water closet connected with an internal middle part of an underground catch basin, a basin A of the catch basin for collecting excrement sewage, a bulkhead arranged at the middle part in the catch basin. The fresh excrement floats to the water surface after being alcoholized in the basin A. The settled sewage flow into basin B. An inverted L-shaped pipe is arranged in the basin B. The water-level pressure sewage overflows from bottom upwards from the pipe and is slantwise discharged into a drain.    USE - The catch basin tank is used for producing biogas energy (claimed).    ADVANTAGE - The tank can automatically collect excrement for manufacturing biogas energy, which is carbon-free, thus compensates combustible gas shortage in nature.    DETAILED DESCRIPTION - Automated excrement collecting catch basin tank comprises a toilet sewage discharge sewer pipes of the water closet connected with an internal middle part of an underground catch basin, a basin A of the catch basin for collecting excrement sewage, a bulkhead arranged at the middle part in the catch basin. The fresh excrement floats to the water surface after being alcoholized in the basin A. The sewage and settled sewage flow into a basin B. An inverted L-shaped pipe is arranged in the basin B. The water-level pressure sewage overflows from bottom upwards from the pipe and is slantwise discharged into a drain. The volume weight of the alcoholized excrement in the catch basin is lower than that of water so that excrement floats to the water surface and then is fermented and decomposed to generate biogas energy. The pipe valve is arranged on the cover of the catch basin. The biogas energy produced by the decomposed excrement is saturated in the catch basin. The valve is opened so that the biogas energy can be ignited.    DESCRIPTION OF DRAWING(S) - The drawing shows a schematic representation of the automated excrement collecting catch basin tank (Drawing includes non-English language text).