Abstract: The relationship between the damage appearance of the glass and the high intensity ns laser pulse is researched by focusing the pulse through K9 glass,whereas the pulse length is 10 ns and its wavelength is 1 064 nm.When the laser pulse focuses on the sample’s center,the feature of the damage is big front segment and small end segment with some cracks at the longitudinal direction.These damage characters could be explained by the feature of laser-supported detonation wave.And when the laser pulses focus on the sample’s surface,the damage is bunch in line,i.e.,string damage with some dot damage,because of inner flaw or particle and the result by dynamic self-focusing effect.