A　method　for　airspace　sectorization　is　developed　based　on　initial　airspace　configuration.　The　method　begins　with　identifying　Traffic　Mass　(TM)　situations　in　all　sectors　ahead　of　time,　especially　for　the　sectors　that　exceeds　the　defined　controller　capability　to　manage　(called　overloaded　sectors)　as　well　as　for　those　that　are　under-utilized　(called　under-utilized　sectors).　Then,　for　the　overloaded　sectors,　the　method　implements　the　removal　of　excessive　Traffic　Mass　by　moving　sector　boundaries　from　the　sector　with　low　TM　to　the　overloaded　sector　in　conjunction　with　a　diffusion　algorithm.　Alternatively,　for　the　under-utilized　sectors,　they　can　be　combined　with　their　neighbors　using　General-Clustering-Algorithm.　The　simulation　demonstrates　that　the　method　not　only　removes　excessive　TM　but　also　improves　efficiency.　More　importantly,　the　designed　sectors　which　follow　the　candidate　boundary　strategy　reduce　controller＇s　cognitive　difficulty,　this　helps　to　keep　controllers　in　as　much　clear-headed　situation　as　possible　to　ensure　flight　safety.　©　2018　Technical　Committee　on　Control　Theory,　Chinese　Association　of　Automation.