Focal length determination method and device of pulse laser, and storage medium

The invention discloses a focal length determination method and device for a pulse laser, a storage medium and computer equipment, and the method comprises the steps: transmitting pulse laser to preset laser dimming photographic paper through a laser transmitting head of the pulse laser, and adjusting a target distance between the laser transmitting head and the preset laser dimming photographic paper according to preset time, the laser emitting head is used for emitting laser light, so that laser spot irradiation traces corresponding to different target distances are obtained on the preset laser dimming photographic paper, and the farthest target distance between the laser emitting head and the preset laser dimming photographic paper is larger than the estimated focal length of the pulse laser; and when the target distances are consistent with the preset distance threshold value and/or when the distance adjustment times are consistent with the preset adjustment times, determining the focal length of the puls