Reservoir water volume monitoring device

The utility model discloses a reservoir water volume monitoring device, which belongs to the field of water volume monitoring, and comprises a vertical rod and a monitoring box arranged at the top of the vertical rod, the vertical rod is of a hollow structure, the bottom of the vertical rod is hermetically connected with a closed end cover, sliding rails are symmetrically arranged on two sides of the vertical rod, and floating balls are slidably connected onto the sliding rails. A sliding groove matched with the sliding rail is formed in the floating ball, an outer magnetic ring is fixed in the floating ball, two vertically-formed synchronous grooves are symmetrically formed in the vertical rod, a synchronous ball is arranged between the two synchronous grooves in a sliding connection mode, conductive contacts are symmetrically connected to the two sides of the synchronous ball in a sliding connection mode, and the two conductive contacts are electrically connected. According to the utility model, the structu