The　air　extraction　control　system　of　high-altitude　cabin　coordinates　the　control　of　multiple　valves　to　connect　the　compressor　units　to　the　extraction　pipeline　network　and　establish　the　environmental　back　pressure　of　the　engine　to　simulate　the　flight　altitude　for　engine　testing.　This　paper　proposes　a　collaborative　optimization　control　scheme　and　algorithm　based　on　an　internal　penalty　function　to　address　issues　such　as　low　efficiency　during　the　connection　of　multiple　compressor　units，potential　exceeding　of　safety　margins　in　compressor　unit　pressure　ratio，and　poor　pressure　control　quality　in　the　extraction　pipeline　network.　Firstly，a　safety　constraint　pressure　optimization　framework　was　established　using　an　internal　penalty　function　to　ensure　the　safety　operation　of　grid-connection　of　compressor　units.　Secondly，a　collaborative　optimization　control　algorithm　was　designed　by　integrating　active　disturbance　rejection　control（ADRC）and　PI　control　to　improve　connection　efficiency　and　pressure　control　quality.　Multiple　practical　working　conditions　were　simulated　to　verify　the　proposed　scheme　and　algorithm.　The　results　demonstrate　that　compared　to　the　currently　employed　independent　control，the　proposed　algorithm　can　improve　system　grid-connection　efficiency　and　control　quality　while　ensuring　the　safety　of　units.　Under　the　condition　of　sudden　increase　and　decrease　in　engine　exhaust　flow，the　time　to　reach　the　set　pressure　was　shortened　by　16.5%，the　maximum　instantaneous　pressure　fluctuations　caused　by　sudden　flow　increase　and　decrease　were　reduced　by　13.4%　and　15.5%　respectively，the　adjustment　time　was　shortened　by　56%，the　control　was　stable　without　overshoot　and　the　swing　range　of　the　core　control　valve　was　decreased　from　5%　to　0.32%.　©　2025　China　Aerospace　Science　and　Industry　Corp.　All　rights　reserved.