Abstract: In the cooperative interception of distributed weapons, a task is often divided into several subtasks. To ensure the tasks fulfilled in real-time, the overall deadline of a global task was translated into deadlines for subtasks using deadline assignment technique in distributed real-time systems. By building the task scheduling model and simulation model, subtasks with deadlines were scheduled in a simulate way at the precondition that weapon amount is constant while the target amount and the proportion of local load on weapon nodes are changing. According to the results, the performance of different methods on task instantaneity and complete rate was analyzed, which can provide reference for research on cooperation of distributed real-time tasks.