The invention belongs to the field of initiation apparatuses, and discloses a laser initiation flyer type initiating explosive-free detonator. The detonator comprises a detonator matrix filled with three-times high explosive, a detonator exciting device consisting of an inner cap and four-times explosive, and a laser initiation system, wherein the laser initiation system consists of a rubber plug, an optical fiber and a laser generating device connected with the optical fiber; the rubber plug is plugged into the inner cap in a detonator shell, the outer surface of the rubber plug is in tight fit with the inner walls of the detonator shell and the inner cap, the middle of the rubber plug is provided with a through hole, the optical fiber connected with the laser generating device passes through the hole, the end of the optical fiber is flush with the lower port of the rubber plug, and the distance between the lower port and the surface of the four-times explosive in the inner cap is less than 15 millimeters; and the laser wavelength of the laser generating device is in a range of 500 to 1,500 nanometers, the optical fiber is a single mode fiber or a multi-mode fiber, and the energy of the laser output by the optical fiber is more than 0.4W. Through the detonator, initiation of the non-dispersed four-times explosive is realized, and the reliability and the safety of the initiation system are improved; and because the transmission optical fiber has high-temperature and high-pressure resistance, the detonator is suitable for severe environments of deep water, high pressure and the like.