In order to meet the delay and azimuth requirements for the multi-beam circum-directional laser fuze, a mathematical model of the optimum detonating delay and the optimum detonating azimuth angle during the process of bombing is established according to the laser detection principle. The simulation is carried out by using Matlab. The results show that the model is related to the information such as the target line of sight, the distance between the projectile, the relative velocity of the missile, the flying speed of the fragment, the shape parameters of the target and the missile. Using the information provided by the multi-beam circum-directional laser fuze system, the optimum detonating delay and the optimum detonating azimuth angle can be determined, and the warhead can be controlled in a timely direction to achieve effective attack on the target.