Taking the TITAN system as the basic framework, by introducing big data processing technology, the communication mechanism, data processing and storage pattern are optimized. Based on the support of radar synchronous observation and realtime transmission technology, a radar mosaic system for the ten radars in Liaoning Province and surrounding areas is developed. This radar synchronous observation and mosaic system can realize the streaming transmission of radar data. The distributed radar data processing is realized through the Kafka distributed system, and the stability of radar data storage is improved by using the Cassandra database.