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By analyzing the source heterogeneity of air targets, a design method of multi-source target tracking platform using ZeroMQ message communication library is proposed. The platform works by the combination of the three communication modes and Json message format for data interaction with each monitoring node, and establishes multi-threaded Push-Poll transmission mode to support multi-source real-time monitoring points enter and exit in order to greatly improve the ability of data interaction processing. In this paper, the least-squares quadratic curve fitting method based on Euclidean distance is proposed to carry out the trajectory association operation. It is an effective way to ensure that the trajectory fusion information is related to the same air target and the target identity information is passed to the target comprehensive identification, which provides a more reliable data foundation and guarantee for the subsequent air situation assessment and threat assessment.