The invention discloses a gun head of a fire-fighting water cannon. The gun head comprises a gun head shell, an inner
nozzle, a spray core, a first flow stabilizer and a second flow stabilizer, wherein the gun head shell is internally provided with a
water flow channel; the first flow stabilizer is arranged at the
water flow inlet of the gun head shell, the second flow stabilizer abuts against theinterior of the gun head shell through the inner
nozzle, the spray core is arranged at the water outlet of the gun head shell, and the
tail end of the spray core is inserted into the inner
nozzle; the head end of the inner nozzle is provided with an inclined outlet, wherein the outlet area of the inclined outlet is gradually enlarged along the spraying direction, the head end of the spray core can block the inclined outlet, and an elastic part is arranged inside the spray core; the spray core can overcome the elastic force of the elastic part and move relative to the
water flow channel when being subjected to the
water pressure action, so that the overflowing area of the water outlet is changed; and the structure of the double-flow-stabilizer enables the water flow to be more stable whenthe water flow is sprayed out of the fire-fighting water cannon, the
water spray flow cannot be dissipated, and the range and the shooting height of the fire-fighting water cannon are improved; and the self-adaption of the size of the opening is achieved under the action of the
water pressure and the elastic part, so that the self-adaptability of the water cannon can be better.