Abstract: An exterior ballistic model of the conductive fiber cluster, which includes stages from dispersing to falling to the ground,was presented to study on the point-dispersing law of the cluster. The model was based on dispersing exterior ballistic theory of submunitions and moving character of the fiber cluster. In particular, the influence of dispersion of dispersing velocities was considered. Besides, Monte Carlo method was applied to select the dispersing velocities to solve the model. Simulation results of spreading range and radius of the fiber clusters are consistent with the flight test, which proves the application reference value of the model.