In response to the current research and practice related to the digital transformation of coal ports，which have problems such as relatively single technology application scenarios，insufficient coverage of the entire chain and scenario，and information silos in subsystems，we carry out the construction and application of a digital twin system for coal ports.Based on a deep understanding and operational practice of coal port scenarios，we adopt key technologies such as the internet of things and system simulation to achieve data standardization and interface standardization on the basis of existing research，and propose a digital twin architecture and five dimensional model covering all elements，processes，and scenarios of coal ports.Based on the application of a coal port，the system achieves the goal of comprehensively and accurately reflecting the port operation situation，avoids coal spontaneous combustion safety hazards，and significantly improves operational efficiency.