Floating and sinking type water pollution detection ball

The utility model relates to the technical field of water pollution detection, in particular to a floating and sinking type water pollution detection ball which comprises a detection ball body, a liquid storage cavity and a control cavity are sequentially formed in the detection ball body from top to bottom, and a liquid taking pipe opening is formed in the top of the detection ball body and penetrates through the interior of the liquid storage cavity. A sealing cover is installed at the top of the liquid taking pipe opening in a covering mode, a liquid level sensor is installed on one side of the inner wall of the liquid taking pipe opening, a liquid pump is installed at the bottom end of the interior of the control cavity, a liquid suction pipe is installed at the bottom end, penetrating through the bottom end of the detection ball body, of the liquid pump, and a liquid supply pipe is installed at the top of the liquid pump and extends into the liquid storage cavity in a penetrating mode. The whole device i