The invention discloses a telescopic type power-assisted fire axe. An axe handle is mainly composed of an installation rod and a sliding rod. An axe blade is arranged on the left side of an axe head. An axe back is arranged on the right side of the axe head. A groove is formed in the lower side of the middle portion of the axe head. The upper portion of the installation rod stretches into the groove and is fixedly connected with the groove. A containing groove is formed in the middle portion of the installation rod. The lower portion of the containing groove communicates with the outer portion of the installation rod. The lower end of the installation rod is fixedly connected with an end cover. A first through hole is formed in the center area of the end cover. The upper portion of the sliding rod stretches into the containing groove through the first through hole, and the upper end of the sliding rod is fixedly connected with a steel plate. Multiple lead balls are arranged in the space, at the upper portion of the steel plate, of the containing groove. Two threaded holes are symmetrically formed in the lower portion of the installation rod. Two lock studs are assembled in the two threaded holes through threads in a thread fit manner. A handle is arranged at the lower end of the sliding rod. The upper end of the side, away from saw teeth, of a saw blade is fixed to the right end face of the axe back in a welded manner, and the lower end of the side, away from the saw teeth, of the saw blade is fixed to the right end face of a connecting block in a welded manner. The left end face of the connecting block is fixed to the right side face of the middle portion of the installation rod in a welded manner. The fire axe is good in universality.