Abstract: The working composition of an active array system of large-scale digital array radar is introduced. In addition, the operation principle of digital array module (DAM) which is the core unit of the system is explained. The information management requirements of the large-scale active array system are analyzed, their solutions and design ideas are discussed, technical applications such as DAM identity tag, array location recognition, remote parallel update based on fiber are provided, so as to form an reasonable and effective design scheme.