Wastewater quality detection device

The invention is suitable for the technical field of detection equipment, and provides a wastewater quality detection device, which comprises: a sampling cylinder, the top of the outer wall of which is provided with an air hole, and the inner wall of the bottom opening of the sampling cylinder is provided with a limiting part; the sampling assembly is rotationally connected to the interior of the sampling barrel and comprises a rotating shaft extending to the outer side of the top of the sampling barrel from the interior of the sampling barrel and a rotating sleeve rotationally connected to the bottom of the rotating shaft, and the outer wall of the rotating sleeve is rotationally connected with a plurality of uniformly arranged plugging pieces; the bottom of the sampling cylinder is plugged by a plurality of plugging pieces when the rotating sleeve rotates in the forward direction, and the bottom of the sampling cylinder is opened and stacked to be attached to the limiting part when the rotating sleeve rotat