Active　disturbance　rejection　control　(ADRC)　emerges　as　a　promising　control　approach　due　to　its　partial　model-based　characteristics　and　strong　disturbance　rejection　capabilities.　Nevertheless,　it　is　a　difficult　problem　to　tune　various　parameters　of　ADRC　in　practical　applications.　To　address　the　challenge　of　parameter　tuning,　this　work　develops　a　parameter　self-tuning　rule　based　on　spatial-temporal　scale　transformations　to　simplify　the　tuning　process　and　enhance　its　control　performance.　In　particular,　based　on　the　transformations　of　spatial-temporal　scale,　the　parameter　tuning　relationships　for　ADRC＇s　components,　including　tracking　differentiator　(TD),　extended　state　observer　(ESO)　and　feedback　controller,　are　provided　for　a　second-order　nonlinear　system.　Numerical　simulations　show　that　the　proposed　method　can　conveniently　and　effectively　provide　a　set　of　well-tuned　parameters　for　ADRC　to　boost　the　efficiency　of　control.　Finally,　the　proposed　parameter　tuning　rule　is　applied　to　the　intake　pressure　control　of　the　flight　test　chamber　system,　further　validating　its　effectiveness.　The　results　demonstrate　that　the　ADRC　with　the　proposed　parameter　self-tuning　method　significantly　improves　the　precision　of　the　intake　pressure　under　different　operating　conditions,　thereby　ensuring　the　reliability　of　aeroengine　flight　tests.