Online sea water quality monitoring buoy

The utility model provides an online sea water quality monitoring buoy; the online sea water quality monitoring buoy is characterized by comprising a floating body bin; a water getting suction head and sensor plugging holes are formed on the floating body bin; an instrument cabin, a storage battery bin and a data collecting bin are arranged in the floating body bin; monitors, storage batteries and data collecting and control units are respectively arranged in the instrument cabin, the storage battery bin and the data collecting bin, wherein the data collecting and control units are connected with the monitors; the monitors are connected with the sensor plugging holes; the monitors and the data collecting and control units are supplied with power by the storage batteries; an underwater balancing structure is arranged at the bottom of the floating body bin; a solar cell panel, an anemometer, an anemoscope and a beacon light are arranged at the top of the floating body bin; and the solar cell panel is connected with the storage batteries. The online sea water quality monitoring buoy provided by the utility model can be used for effectively monitoring sea water quality parameters for a long time under severe environments with sea corrosion, strong wind, big waves, frequent navigations of ships and so on.