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In the process of emergency rescue of metro construction, faced with the following problems: multi-coordinated, rescue scene interact with the remote command center, the pool of resources inside and outside the enterprise and other process. In order to save time and improve the efficiency of the rescue, the emergency rescue procedures must ensure scientific and effective. This paper establishes emergency rescue work flow model based on the Petri nets, and the performance analysis of time for this model is included. The time consuming of whole emergency rescue process can be calculated, and the calculation results have an important guiding significance for daily emergency rescue training exercises and actual combat. Then the authors put forward the optimization ways of emergency rescue workflow.