Automatic activated sludge sampling device

The utility model relates to the technical field of activated sludge sampling devices, and discloses an automatic activated sludge sampling device which comprises a waterproof shell, a collecting box is fixedly mounted at the top of an inner cavity of the waterproof shell, and a discharge hole is formed in the bottom of the collecting box. By arranging the collecting box, the time relay and the sludge pump, an operator can set the time relay in advance, so that the time relay can intermittently electrify the sludge pump, the sludge pump can be started at set intervals, activated sludge is extracted and sampled, and the sampling efficiency is improved. Due to the fact that the starting duration of each time of the sludge pump is the same, the amount of the activated sludge extracted by the sludge pump during each time of starting is the same, the function of automatic all-day quantitative sampling can be achieved, an operator can sample and detect the activated sludge conveniently, and meanwhile more accurate