Abstract: The overall emergency plan made by each province for its territorial emergencies presents horizontal intergovernmental differences under the territorial emergency management system. Whether this difference leads to the quality difference of the plan text is a research topic that needs to be answered. Taking the overall emergency plans of 29 provinces as an example, the quantitative evaluation system of emergency plans is constructed by text analysis, and the PMC index of emergency plans of each province is calculated. The quality evaluation results of provincial emergency plans are analyzed from three dimensions: overall and component quality, grade difference, and time difference. It is found that the overall quality of the provincial emergency response plan is good, but the differences in the content and structure of the provincial emergency response plan text form its differences in the quality. The provincial emergency plan has high quality in its application and system, but the text quality in its management and organization and command is relatively low. The quality of the emergency plan issued or revised after the epidemic in COVID-19 is higher than those issued before the epidemic, but it is weakened in terms of emergency resource guarantee. Thus, it is necessary to optimize the overall emergency plan of each province through intergovernmental policy study; pay attention to the plan management in the top-level design of the emergency plan system; "simplify" rather than "reduce" the description of auxiliary emergency resource guarantee in the emergency plan.