Water flow self-driven water gauge automatic scrubbing and trash holding device

The invention relates to a water flow self-driven water gauge automatic scrubbing and trash holding device which solves the problem that when floating objects on water entangle a water gauge or sludge is attached to the water gauge and shields scales of the water gauge, the water level cannot be automatically observed and read. A water gauge of the device is sleeved with a trash holding and scrubbing mechanism floating on the water surface, the trash holding and scrubbing mechanism sequentially comprises an upper lantern ring, a trash holding floating ring and a lower lantern ring from top to bottom, the diameter of the trash holding floating ring is larger than that of the upper lantern ring and that of the lower lantern ring, a plurality of connecting rods are arranged between the upper lantern ring and the trash holding floating ring and between the lower lantern ring and the trash holding floating ring, a vertical rod is arranged between the upper lantern ring and the lower lantern ring, a brush is arrang