To address the prominent shortcomings in safety and emergency management at Zhapo fishing port in Yangjiang,such as outdated monitoring methods,slow emergency response,insufficient collaborative linkage,and lack of scientific support for decision-making,a smart emergency command system based on digital twin technology is constructed.The system takes the five-dimensional digital twin model as its theoretical framework,integrates technologies such as the internet of things(IoT),BIM+GIS,big data,and artificial intelligence,and forms an intelligent management closed loop of “sensing-perceiving-analyzing-decision-making-controlling”.Practice shows that,compared with traditional emergency management models,this system successfully transforms the static emergency plans for “people,ships,ports,and venues” into dynamic,visual,manageable,and traceable digital solutions.In typhoon emergency scenarios,the recall response time for fishing vessels is shortened from 2 hours to 40 minutes,with an efficiency improvement of 65%.This verifies that the system can effectively promote the transformation of fishing port emergency management mode from “passive response and experience-based decision-making” to “proactive early warning and scientific regulation”, providing a replicable technical path and practical model for the construction of smart fishing ports in China.