The invention discloses a cognitive radar information processing platform architecture. Based on an existing cognitive radar system, an knowledge auxiliary co-processing system is added. The system ismainly used for prior knowledge caching and radar echo characteristic parameter extraction, simultaneously is cooperated with a signal/data processing system to complete the realization of a knowledge auxiliary radar signal processing algorithm, and is a core component of a cognitive radar system. The architecture has advantages that the information processing platform architecture can satisfy acognitive radar information processing requirement and improve a radar anti-interference ability; through introducing a big data fast access module, a coprocessor, an open exchange structure and othermodules, the architecture can completely satisfy demands of a cognitive radar construction dynamic database, prior knowledge calling and other aspects; and simultaneously, system expansibility is increased, which is convenient for follow-up maintenance and upgrading.