At present, the research of Civil Aircraft Atmospheric data system is mostly focused on the atmospheric data computer and the pitot tube aerodynamic characteristics, but the specific atmospheric data module has little research on the effective data of ADS. The influence of atmospheric data module on the pressure pipeline and data precision of civil aircraft is studied, and the structure and performance of ADIRS are analyzed based on the model of pipeline and altitude parameter, the atmospheric test data of the CRJ200 Model DADC, G450 model and G550 model ADIRS are studied. Firstly, the cause of the different error range is found, and then the measured data of three different models are compared, it is concluded that G450 and G550 with ADM can improve the leakage accuracy of aircraft and reflect the air data of civil aircraft in real time. It is found that the design and application of ADM can effectively reduce the layout of the pressure pipeline on the aircraft, save the installation space on the aircraft, reduce the deformation and leakage of the pressure pipeline, and improve the data accuracy of ADS.