The present application aims to provide a wave spectrum observation
buoy for
marine engineering with reduced entanglement wear and a reduced
observation method. The present application comprises a marker
buoy, a connecting piece pivotally connected to the lower end of the marker
buoy, a
wave buoy snap-connected to the end of the connecting piece, and an anchor cable piece hingedly connected to the lower end of the marker buoy and used for anchoring the
seabed; the
wave buoy is provided with an observation device for observing meteorological
hydrology, and the
wave buoy rotates around the marker buoy through the connecting piece. The detection buoy observes the
sea waves of the surrounding area by rotating around the marker buoy through the connecting piece, and the connection between the connecting piece and the marker buoy is connected through a limiting ring to isolate the torsion force and avoid the entanglement of the connecting piece when the observation buoy rotates around the circumference, thereby improving the wave-following performance of the observation buoy, increasing the accuracy of wave spectrum detection, and effectively avoiding the influence of the connecting piece on the sensitivity of wave regulation. The present application is applied to the technical field of wave spectrum buoys.