Abstract: Affected by the increasingly complex target characteristics, electromagnetic environment and geographical environment, the detection effectiveness of single-unit radar is greatly constrained, and the radar network cooperative detection technology provides a technical mechanism to enhance the detection capability of single-unit and intra-system targets, anti-jamming capability and intelligence support capability. Radar network cooperative detection system can be divided into two categories: task level/ parameter level and signal level. For the task-level and parameter-level network cooperative detection system, in order to realize the main functions of radar cooperative operation, overall detection, regional confrontation and intelligence sharing within the network, the engineering design mainly accomplishes the functions of task planning, cooperative management and control, information fusion, performance evaluation, cooperative engagement command and control, and network communication, etc. , so as to realize the system empowerment for the single-unit and system. The signal-level distributed cooperative detection system mainly solves the problem of time, frequency and space synchronization, forms a dual/ multi-base signal cooperative system, realizes the signal-level gain of the receiving and sending phase reference system, and realizes the equivalent “big radar” performance.