In　the　process　of　promoting　hydrogen　energy　in　the　automotive　field,　priority　should　be　given　to　addressing　the　safety　concerns　associated　with　its　use.　Ventilation　is　an　important　means　to　prevent　the　accumulation　caused　by　hydrogen　leakage　in　hydrogen　fuel　cell　buses.　The　effects　of　the　relative　positions　of　two　events　on　hydrogen　dispersion　in　a　space　with　multiple　obstacles　is　studied　to　investigate　the　ventilation　effect　of　the　hydrogen　fuel　cell　bus　with　seats　in　this　paper.　Two　leakage　scenarios,　micro　leakage　rate　of　1.4　g/s　and　severe　leakage　rate　of　35.8　g/s,　were　set　up　in　this　study　to　investigate　the　distribution　of　hydrogen　concentration.　In　these　two　scenarios,　the　primary　vent　is　fixed　at　the　top　of　the　space,　and　the　position　of　the　secondary　vent　is　changed.　For　micro　leaks,　the　results　indicate　that　ventilation　scheme　with　auxiliary　air　vents　located　above　the　windshield　can　prevent　the　combustible　area　of　hydrogen　from　continuously　expanding　after　spreading　to　the　top　of　the　space　and　is　most　conducive　to　reducing　the　combustible　area　in　the　passenger　cabin　of　the　hydrogen　fuel　cell　bus.　For　severe　leaks　with　a　hydrogen　leakage　rate　of　38.5　g/s,　the　relative　position　of　the　dual　vents　has　no　significant　effect　on　leaking　hydrogen　dispersion,　and　ventilation　scheme　in　this　study　for　the　micro　leakage　is　not　sufficient　to　effectively　reduce　hydrogen　concentration.　The　findings　of　this　research　hold　significant　reference　value　for　advancing　hydrogen　energy　within　the　automotive　field.