Quickly evacuate personnel from the leaking pollution area to the upwind area, and immediately isolate them, and strictly restrict access. It is recommended that emergency responders wear self-contained positive pressure respirators and wear gas clothing. Enter the site from the upwind. Cut off the source of the leak as much as possible. Cover places such as sewers near leakage points with industrial overlay or adsorption absorbents to prevent gas from entering. Reasonable ventilation and accelerate diffusion. Spray water dilutes and dissolves. Build embankments or dig pits to contain large amounts of wastewater. If possible, use a trap to pass the gas through the sodium hypochlorite solution. The leaky container should be properly disposed of, repaired and inspected before use.