Firstly, the advantages of flight simulators and the three types of flight simulation software widely used by current flight students are briefly described, focusing on the analysis of instrument landing knowledge, how to read the instrument approach procedure charts, and how to use the flight simulation software to implement various instrument landing systems, so as to make the correct operation according to the approach procedure charts. Based on Prepar3D flight simulation software, Cessna C172R G1000 system was used to demonstrate two different types of precision approaches, so that the trainees could be more clearly and intuitively familiarized with the relevant operation procedures of precision approaches. From the results of the demonstration, it can be seen that flight simulation has the advantages of improving training efficiency, saving training funds, ensuring flight safety, and reducing environmental pollution, etc. The advantages of flight simulation software can fundamentally improve the flight skills of the trainees, increase flight experience, and thus reduce the incidence of major safety accidents.