The invention relates to a fire-fighting unmanned aerial vehicle, including a fuselage made of titanium alloy, a rotor, a power device and a control device, the rotor is fixedly connected to the fuselage through a connecting rod, the power device is connected to the control device, and the The camera and the fire bomb launching device on the fuselage, the output end of the camera is connected with the input end of the control device, and the output end of the camera is also connected with the command system of the command center; the fire bomb launching device is fixed on the top surface of the fuselage through a bracket, The fire bomb launching device includes a tapered sleeve for containing fire bombs, a box fixed at the lower end of the tapered sleeve, a transmission channel passing through the upper wall of the box connected to the lower end of the tapered sleeve, and a box fixed by a transverse bracket. In the delivery bin, one end of the horizontal bracket is fixedly connected to the side wall of the bracket, and the other end of the horizontal bracket is fixedly connected to the outer wall of the delivery bin. The invention has simple structure, convenient operation, wide application range, and can control the precise projection of fire bombs.