Adjustable hair drier

The utility model discloses an adjustable hair drier. A handle is rotationally connected with a hair drier shell; the sliding adjusting assembly is arranged in the hair drier shell, the air adjusting assembly comprises a first gear and a linear rack which are meshed with each other, the linear rack is slidably connected with the inner wall of the hair drier shell, the first end of the first rotating shaft is connected with the handle, and the second end of the first rotating shaft is fixedly connected with the first gear; the air adjusting assembly is arranged in an air outlet channel of the blower shell and comprises an air blocking piece and a circular truncated cone base. The circular truncated cone base is fixed on the inner wall of the air outlet duct and forms a ventilation gap with the inner wall of the air outlet duct; the air blocking piece is fixedly connected with the linear rack, provided with a first air hole and slidably arranged on the inclined outer wall of the circular truncated cone base in