The invention discloses an electricity self-generating marine monitoring buoy suitable for arbitrary flow speed and any direction. The electricity self-generating marine monitoring buoy comprises a main body and is characterized in that a set of supporting arms with equal intervals are arranged around the main body, each supporting arm is in an L shape; the tail ends of the supporting arms are fixedly connected with buoy seats; the center of the lower end of the main body is fixedly connected with a rotating water diversion shaft through a rotating water diversion shaft connecting seal end cover; the lower end of the rotating water diversion shaft is connected with a rotating water diversion block in a hinged mode through a bearing; and a signal marker lamp is arranged at the center of the top of the main body. The electricity self-generating marine monitoring buoy can be suitable for the turbulent environment in the horizontal direction, the vertical direction and even any direction, turbulent flows in any direction are fully utilized to generate electricity, and by fully utilizing the aerodynamic principle and the hydromechanics principle, efficient electricity generation is achieved through the turbulent flows.