A diamond-shaped wave-resistant and storm-resistant deep-water culture net cage is characterized by comprising a net cage frame system which is composed of an outer floating frame, an inner floating frame, a reinforcement pipe, a 60-degree elbow, 60-120-degree lateral tees, 120-degree elbows and floating frame connecting pieces, a mooring system which is composed of a mooring rope, an anchor chain, an anchorage, a front-end buffer floating ball, middle floating balls, a buffer counter weight and a rear-end buffer floating ball, a net cage flow reduction stable structure which is composed of wave stabilizing plates and front-end flow reduction nettings, and a net bag system which is composed of nettings, ground ropes and a bottom frame. The floating frames are of a diamond-shaped structure, and a multi-section buffer single-point mooring system is adopted by the mooring system, through the diamond-shaped frame structure and the multi-section buffer single point mooring system of a net cage, the top of the net cage directly faces wave currents under the action of the wave currents, and a wave breaking effect is achieved, so that the acting force of the waves to the net cage is reduced, and the Chinese Blue granary strategy implementation and the mariculture development tendency from inshore to deep sea are promoted.