Ocean drifting buoy

The invention belongs to the technical field of buoys, and particularly relates to an ocean drifting buoy which comprises a water sail body and an instrument cabin, the water sail body and the instrument cabin are connected through a steel cable, a supporting rod is connected to the top of the instrument cabin, and a meteorological observation module is arranged at the top of the supporting rod and used for observing meteorological parameters above the sea surface. The bottom of the instrument cabin is provided with a hydrological observation module used for observing seawater hydrological parameters, the instrument cabin is spherical, the device can be used for detecting meteorological parameters above the sea surface and the seawater hydrological parameters, the contact surface of the upper half floating ball and the lower half floating ball is provided with an O-shaped sealing ring, and the sealing performance is good. The outer wall of the joint of the upper half floating ball and the lower half floating