Data Life Cycle (DLC) model is the critical medium interlinking the data management strategies and practices. This paper analyzed the typical DLC models' construction and phases' characteristics as research basis. Combining the sources and features of public safety data, the overall public safety data life cycle model was constructed. Then basing on the public safety activities, the public safety data management model was put forward which combines the public safety data life cycle and the public safety activities life cycle. Meantime, the function of the public safety data management model was discussed as well.