In order to solve the problem of emergency management capability evaluation for major emergencies. Taking the military and local governments as the research object, and a capability evaluation index system is established based on the development stage of the emergency management life cycle, the entropy method, and matter-element extension theory to construct the emergency management capability evaluation model of military-civilian co-processing major emergencies. Then the research data of Shanghai, Shenzhen, Tianjin, Chengdu, and Kunming are brought into the model and calculated. The results show that the emergency management capabilities of Shanghai and Chengdu for co-processing major emergencies have more advantages than other cities. The reliability of the model and the accuracy of the calculated results are verified by web crawler technology. Finally, suggestions were proposed from five aspects with a view to making contributions to the construction of local military and civilian emergency management: emergency preparedness, organization and coordination, emergency response, emergency support, and post-disaster reconstruction.