Multi-tube pneumatically-launched fire extinguishing cannon

The invention discloses a multi-tube pneumatically-launched fire extinguishing cannon which comprises an air storage tank erected on a bracket, wherein a plurality of air storage nozzles are arrangedon the tank wall of the air storage tank; a plurality of independent closed chambers are arranged in the oil storage tank; all the air storage nozzles and all the chambers correspond in a one-to-one manner; cannon tubes are arranged in all the chambers; a plurality of air grid holes distributed in a ring shape are arranged on the tube walls of the cannon tubes and positioned in the corresponding chambers; cannon supports are arranged in the cannon tubes; both the upper parts and the lower parts of the cannon tubes are sleeved with two sealing rings; the two sealing rings are correspondingly positioned on both sides of the air grid holes; the lower ends of the cannon supports are propped against a launching base; and a launching air nozzle is arranged at the middle of the lower end surfaceof the launching base. The