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The low altitude security present situation and the challenge under the new situation of police law enforcement personnel are analyzed, and studied the current police and main equipment of unmanned systems in low altitude airspace monitoring, daily patrol and reconnaissance, forensics, rapid disposal of police activities, the application of three-dimensional digital air corridor technology, explores the police unmanned system in calling the police,alarm receiving, law enforcement, the disposal of low altitude security application strategy in the business process. In the construction of mathematical modeling in the low altitude airspace, the the data missing problem of real-time threat diffusion trend analysis of data missing problem of unmanned aircraft system was proposed. According to the data attribute values in the study of mathematical modeling, the data estimation method based on interval data attributes and the distance data attributes was built respectively. Finally, the application prospect of police unmanned system in low altitude security fields is prospected.