| The interaction characters and mechanism of energetic materials B/KNO3 were researched in the process of ignition by pulse laser, the main work was study on characters, parameter of laser plasma and its effect to laser ignition. Electric parameter of plasma was tested by parallel electrodes; Spectrum of plasma wave was tested by monochromator. As well, effect of plasma during laser ignition process was studied and laser ignition model was evaluated. The main conclusions were as follows:(1) Phenolic resin could affect the characters of laser ignition: made the powder more sensitive and delay time shorter. (2) Laser produced plasma needed an ignition threshold and ignition delay time; when plasma was ignited, the density of plasma was increased as the laser energy density. (3) The ignition threshold of plasma was about several 104W·cm-2, it was far lower than commonly material. The ignition delay time was about few μs. (4) Calculation showed the charge flux of plasma was about 10-5c·mm-2·s-1,the average kinetic energy of single particle was about 103104eV, it was larger than flame's (102eV). (5) The rage of plasma spectrum was in UV area and visible area, and from 540nm to 570nm there was a peak intensity of spectrum. (6) Shield effect of plasma was qualitative studied. (7) Laser ignition model had to including enhance of quality balance and effect of ablation, vaporization and plasma.
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