Water quality sampling device

The utility model discloses a water quality sampling device which comprises a floating box, the top of the floating box is fixedly connected with a sampling box, the sampling box is internally provided with a storage cavity and a filter cavity, the filter cavity is internally provided with a filter assembly, the filter assembly is provided with a filter element seat, the bottom of the filter element seat is fixedly connected with a filter element, and the bottom of the filter element seat is provided with a water outlet. The device has the beneficial effects that in the working process of the device, firstly, the water pumping pipe sinks into water through the gravity of the pipe sinking piece, then the first water pump is opened, the second water pump is closed, at the moment, the first water pump is connected with the fixed pipe through the hose to suck the interior of the filter element, and the interior of the filter element is communicated with the inlet and outlet pipe through the sampling box; water ca