Self-adaptive zooming device

The utility model relates to a self-adaptive zoom device, which comprises a laser, a sliding module, a laser range finder, a controller, an aspheric lens and a beam expanding and focusing lens group, the aspheric lens is arranged at the laser outlet of the laser, and the beam expanding and focusing lens group is arranged at the light emitting side of the aspheric lens; the aspherical lens is fixed with the sliding module, and the distance between the aspherical lens and the beam expanding and focusing lens group is adjusted by the sliding module; the laser, the sliding module and the laser range finder are electrically connected with the controller. The beneficial effects are that the laser range finder emits laser to a target object to realize range finding and feeds the range finding information back to the controller, and the controller controls the sliding module to start according to the fed-back range information so as to adjust the distance between the aspherical lens and the beam-expanding focusing le