The invention provides a laser damage resistance testing system which comprises a pulse laser, a first light barrier, a first polaroid, a first half wave plate, a first electronic control rotating table, a second light barrier, a second polaroid, an indicating light source, an electronic control zoom system, a first 45-degree partial reflecting mirror, a CCD facula analysis meter, a second 45-degree partial reflecting mirror, an energy meter, a photoelectric detector, a sample room, a monitoring camera, a third light barrier and a control system. Lasers are focused in the sample room, focused faculae can be adjusted continually through the control system, damage strength is formed, video real-time monitoring is available in the sample room so that a tester can monitor a threshold value point when a sample is damaged, the size of the faculae at the position of the sample is monitored in real time by the CCD facula analysis meter, a three-dimensional strength distribution diagram of the faculae is given, pulse energy is monitored in real time by the energy meter, the pulse width of the lasers is detected by the photoelectric detector in real time, real-time peak value power density is provided after detection data are processed through software, and the damage threshold value of the sample is detected accurately.