The　ability　of　a　high-altitude　test　bench　flight　environment　simulation　system　to　accurately　simulate　high-altitude　environmental　parameters　plays　a　crucial　role　in　the　performance　testing　and　evaluation　of　aviation　engines.　However,　the　strong　coupling　between　controlled　pressure　and　temperature　variables　in　the　core　air　intake　environment　simulation　subsystem,　along　with　sensor　measurement　noise,　limits　the　overall　control　quality　of　environmental　parameters.　For　this　purpose,　this　paper　proposes　an　adaptive　active　disturbance　rejection　control　based　on　coupling　degree　identification,　abbreviated　as　AADRC,　which　efficiently　matches　the　system　control　channels　while　solving　the　flight　environment　simulation　control　problems　caused　by　variable　coupling　and　measurement　noise.　Based　on　the　relative　gain　array　method,　the　coupling　degree　of　the　control　variables　of　the　linearized　system　is　identified,　providing　a　matched　control　loop　for　the　high-temperature　gas　control　valve　and　the　low-temperature　gas　control　valve.　Considering　the　impact　of　sensor　measurement　noise　on　the　performance　of　active　disturbance　rejection　control,　an　adaptive　extended　state　observer　with　adaptive　bandwidth　adjustment　method　based　on　relative　gain　array　method,　referred　to　as　AESO,　is　proposed.