The invention relates to a fine water mist fire-fighting helicopter of a helicopter-lifted fine water mist fire-fighting device. The problems that the water consumption is large, the subsequent water supply is difficult, and the fire extinguishment effect is influenced can be effectively solved. According to the technical scheme for solving the problems, the fine water mist fire-fighting helicopter comprises a helicopter and a fire extinguishing device; the fire extinguishing device is lifted below the abdomen of the helicopter by a steel rope; the upper end of a water absorption tube at the lower part of the fire extinguishing device is connected with a water tank of the fire extinguishing device; the lower end of the water absorption tube is connected with a submersible pump; the water absorption tube is provided with an electronic valve below the fire extinguishing device; and the fire extinguishing device is provided with a controller. The fine water mist fire-fighting helicopter has a simple structure, utilizes the air advantages of the helicopter, can be effectively used for the fire extinguishment and the fire prevention of forests, is flexible and mobile, and has less water consumption and a good fire extinguishment effect.