The invention discloses a test method for the dynamic fire extinguishing effects of a fire extinguishing system. The method includes arranging a combustible site within the effective range of a fire extinguishing launcher; embedding an electric ignition device on the downwind top of the combustible site; preparing a firefighting truck and a scout car outside a fire isolation zone, the firefightingtruck being full of water for fire extinguishing; sending an instruction by a command car after everything is ready, and starting igniting on the combustible site; sending information through the scout car at the front fire scene to the command car; and performing correction by a follow-up fire extinguishing bomb according to the situations returned by the first bomb, and continuously emitting the fire extinguishing bombs to suppress and control the fire. Through the method, real fire extinguishing environments of the fire scenes can be effectively simulated, and an original static state canbe changed into real dynamic fire extinguishing, so that the deficiency of the static fire scenes can be overcome; and the needed number of the fire extinguishing bombs and fire extinguishing effectsin a certain fire scene scope can be effectively determined according to the method, and a brand-new fire extinguishing concept can be provided for extra-long-distance fire extinguishing at home and abroad.