Abstract: The spatial distribution of burning particles in the pyrotechnic flame play an important role in the ignition and spectral radiance of the pyrotechnic. The first, the local model of the burning particles was built based on the parameters of initial velocity. The second, the sharply focused images of the burning particles in pyrotechnic flame were shot by the high speed camera (HSC) photography, and then coordinate position and velocity vector were analyzed by the image processing techniques. As a result, the local model of the burning particles was corroborated and revised, thus the regulation of velocity distribution was derived. Particle image velocimetry (PIV) was used to investigate the spatial pattern and velocity of burning particles in the flame of pyrotechnics. The investigation result shows that the direction of main burning particles matches the fluid field of flame, but the contour profile of velocity exist large difference.