The mathematical simulation model on the approach process of carrier-based airplane was built up in consideration of complicated environment. The influence of carrier air wake and crosswind on the carrier-based airplane landing safety was researched through computation and simulation. The strongest crosswind that carrier-based airplane can endure while approaching on certain initial circumstance was given. The research results indicate that the carrier air wake disturbance must be restrained through pilot operation during the approach process, or else it would cause remarkable position error and decrease the landing precision. For certain initial approach states, the strongest crosswind that the carrier airplane can endure is certain, and any stronger crosswind would lead to failure in approaching and landing process.