With　the　development　of　urbanization　and　the　growth　of　population,　there　is　a　growing　demand　for　safety　in　public　building　facilities.　As　one　of　the　essential　building　components　of　urban　architecture,　bottlenecks　have　a　significant　impact　on　the　evacuation　efficiency　of　crowds.　Furthermore,　the　heterogeneity　of　crowds　also　contributes　to　the　complexity　of　crowd　movement　through　bottlenecks,　while　aggravating　the　magnitude　of　congestion　induced　by　bottlenecks.　The　objective　of　this　paper　is　to　explore　the　movement　characteristics　of　heterogeneous　crowds　passing　through　a　corridor　with　a　bottleneck　by　conducting　a　controlled　experiment.　There　were　three　variables　in　this　experiment,　namely　the　individual　categories　(i.e.,　able-bodied　individuals,　simulated　individuals　on　crutches　and　simulated　wheelchair　users),　bottleneck　width　(i.e.,　1.2,　1.6　and　2.0　m)　and　proportion　of　simulated　disabilities　in　crowds　(i.e.,　0　%,　5　%　and　10　%).　Then　offset　angle,　passing　efficiency,　fundamental　diagram,　etc.,　were　analyzed.　In　trials　involving　simulated　individuals　on　crutches,　a　higher　detouring　degree　is　observed　compared　to　trials　involving　simulated　wheelchair　users　or　mixed　groups　of　two　types　of　simulated　disabilities.　There　is　an　increase　in　flow　rate　induced　by　increasing　the　bottleneck　width　and　decreasing　the　proportion　of　simulated　disabilities.　The　passing　efficiency　at　the　upstream　of　the　bottleneck　in　all　tests　is　primarily　influenced　by　the　bottleneck　width,　while　by　the　type　and　proportion　of　simulated　disabilities　at　the　downstream　or　inside　the　bottleneck.　The　findings　are　intended　to　complement　the　dynamic　theory　of　heterogeneous　crowds　at　building　bottlenecks,　while　providing　a　reference　for　congestion　control　of　crowds　at　bottlenecks.　©　2024　Elsevier　B.V.