Deep detection structure of polluted water source

The utility model discloses a polluted water source depth detection structure which comprises a fixing plate, a plurality of sampling cylinders are arranged below the fixing plate, each sampling cylinder comprises an upper cylinder body and a lower cylinder body, the upper cylinder body is connected with the lower cylinder body through a flange, an opening and closing cylinder is sleeved between inner cavities of the upper cylinder body and the lower cylinder body, and telescopic rods are installed between the adjacent sampling cylinders and between the sampling cylinders and the fixing plate.A rotating rod is installed between the two ends of the opening and closing barrel and rotationally penetrates through the end face of the sampling barrel, a water inlet is formed in the bottom of the outer wall of one side of the lower barrel, the outer wall of the other side of the lower barrel is sleeved with a water outlet pipe, a valve is installed on the water outlet pipe, and a water through opening is formed in t