With the development of industry level and science and technology, aircraft manufacturing and assembly have gradually changed from analog to digital transfer. Due to the flexibility, rapidness and accuracy brought by high digitalization, digital assembly coordination has become the trend of future development. However, the technology of digital quantity transmission in China is not mature enough at present. This paper explores the application of combining digital quantity and analog quantity in aircraft door assembly by studying and verifying the assembly and coordination method of an aircraft emergency door. According to the comparison and analysis of the actual situation, the digital-analog quantity coordination method was chosen, and the standard tooling was introduced to assist the assembly of the emergency hatch door. In addition, the influence of digital quantity transfer mode and digital-analog quantity transfer mode on door assembly and coordination was compared under the current technological level, and the optimization effect of digital-analog quantity coordination mode was verified, which provides reference for the assembly and coordination work of other aircraft or other doors.