In order to improve the ability of airport fire protection, the construction method of airport fire protection digital twin based on digital twin technology was proposed. According to the actual support elements of the physical airport, the three-dimensional model, meteorological model, geographical environment model and fire scene model of the main fire-fighting equipment in the airport were established. According to the operation characteristics of the fire-fighting equipment, the kinematics simulation model of the equipment was constructed, and the digital twin model of the airport fire-fighting support was constructed. The results show that this method can lay a foundation for building the digital twin system of airport fire protection.