The pulse inline holography has been applized to construct the holography system and the high accuracy synchronization system.The hologram of microjet produced by explosive was gotten in the experiment. When the hologram was reconsructed, the distribution and the size of particle were analyzed. The statistical result of particles shows that the maximum size is 300μm and the minimum size is 30μm. This measurcment system was proved that the pulsed in line holography can measure the high velocity microjet.