Marine water quality monitoring buoy

The utility model relates to the technical field of ocean water quality monitoring equipment, and discloses an ocean water quality monitoring buoy, which is characterized in that a solar cell panel mechanism is arranged in the middle of the upper part of a floating platform seat body, and three groups of counterweight mechanisms are arranged on the seat body of the floating platform along the circumferential direction; and the three groups of counterweight mechanisms are symmetrically arranged in a star-triangle manner relative to the circular truncated cone of the floating platform. According to the utility model, the balancing weights can be hung deep in seawater in a vertical mode by winding and unwinding the steel cables in the balance weight mechanisms, and then the three groups of balance weight mechanisms which are symmetrically arranged in a star-triangle shape are used for hanging the corresponding balancing weights, so that a star-triangle hanging mode can be formed, and the balance weight hanging w