The invention relates to a ship dot-matrix anti-supersonic semi-armour-piercing missile warhead protection net. The ship dot-matrix protection net comprises a supporting frame and at least one layer of protection net structure fixedly installed in the supporting frame; the protection net structure comprises impact blocks and a connecting cable, the impact blocks are arranged in the supporting frame in a dot-matrix mode, and sequentially connected through the connecting cable to form an entire protection net structure, and the ends of the connecting cable are fixedly connected with the supporting frame; and the impact blocks are made of high-density and high-hardness materials and used for erosion, upsetting, and fracturing of projectile bodies, the connecting cable is used for connecting the impact blocks, carrying, and transmitting the weight of the impact blocks. The ship dot-matrix anti-supersonic semi-armour-piercing missile warhead protection net is arranged in the direction of missile attacking, by being combined with the protection structures such as an outer plate and an important compartment composite armored bulkhead for using, the missile triggers the fuse when penetrating through the outer plate, the damage power of a warhead after the explosion can be reduced after the warhead is in contact with the protection net, the total weight of the protection armored structure is reduced, and the maneuvering performance and vitality of the ship are improved.