To optimize the distribution strategy of a new type of smart blockade and control ammunition, plan the joint dispersion trajectory scheme of ammunition clusters and improve the accuracy of impact point accuracy evaluation, a joint simulation and evaluation method of impact point dispersion of ammunition clusters was proposed based on parachute-payload dynamics model, Monte Carlo method and elliptic probability error model. The distribution strategy was designed based on time-series control. An integrated model for joint simulation of impact points distribution accuracy of ammunitions under multi-source disturbance was established. The influence law of random disturbance sources on impact point dispersion of ammunition was analyzed, the distribution and dispersion range of ammunition clusters were calculated, and the impact point accuracy of ammunition clusters was evaluated. The results show that the aerodynamic characteristic disturbance of the parachute has the greatest influence on the horizontal dispersion of the impact point, and the cross-wind disturbance has the greatest influence on the lateral dispersion of the impact point. The impact point dispersion of ammunition clusters is irregular ellipse, and the closer to the standard value, the denser the impact points are, and the impact point areas does not overlap each other, the distribution strategy is feasible.