The invention relates to a portable fast flap and cut multifunctional forest extinguishing stick which uses a micro gasoline engine to drive a transmission notch gear of a central angle of 120 DEG ina mesh mode, the transmission notch gear is meshed with and drives a tooth bar which is connected with a saw blade by a steel wire flexible shaft through a spring, and the saw blade is arranged in front of the stick. The saw blade is provided with sharp sawteeth, the top end of the saw blade is provided with scissors which can cut small trees and shrubbery mass around fire if needed; and the saw blade is movably connected with an extinguishing flapping plate by a bolt. The drawing of the tooth bar leads the extinguishing flapping plate to flex upwards, when the transmission notch gear is meshed with the teeth and reaches the notch, the extinguishing flapping plate in the stick is ejected to flap fire at high speed under the action of the spring because the tooth bar loses the pulling forceof the transmission notch gear, and the goal of fire extinguishing is achieved through such repeated ejection and flap.