In order to solve the urgent business needs of CMACast defects and provincial users to obtain provincial realtime observation data and gridded realtime datasets, the provincial data sharing system based on the message notification mechanism is designed and implemented. The system integrates business and data resources based on the rabbitMQ message mechanism. It adopts multilayer architecture, which can meet national and provincial data sharing needs such as fast and orderly data download based on CMANet and supplementary adjustment of CMACast. It supports highspeed transmission of largecapacity data, HTTP, FTP, SFTP and other data transmission protocols. The provincial coordination system has been operational, providing provincial meteorological departments 25 kinds of meteorological data with intelligent grid products and multisource realtime datasets. The average amount of data shared per month is 6.3 T, and the establishment of fullprocess monitoring to ensure the timeliness of data sharing effectively.