Abstract: This paper introduces the application of ATM switching technique in the communication of a netted-radar system. By analyzing the requirements for communication of the netted-radar system based on central processing station, it presents an ATM switch architecture similar to the client-server model. The ATM is considered to be the base of the broadband integrated services digital network (B-ISDN), while ATM switching technique is the key content of ATM. It is shown in the paper that ATM switches are not only useful for the civil communication traffic but also valid for the traffic involved in the tracking of tight multiple targets in a netted-radar system under the condition of jamming. The paper analyzes the data switching of ATM switch in the netted radar system. The utilization and probability mass functions of output queue lengths of the output buffered ATM switch are evaluated in three particular communication surroundings with the help of computer simulation.