High-pressure water mist system with a droplet size of DV0.50 ≤ 400μm and DV0.99 ≤ 1000μm, rated spraying pressure of 4MPa. Compared to the traditional water mist system with a droplet size of DV0.50 ≤ 79.34μm and DV0.99 ≤ 9.27μm in a 1L/s fine water mist system, it offers stronger droplet penetration and higher fire suppression efficiency