Pedestrian　movement　is　complicated　in　merging　flow.　Merging　layout　and　angles　may　restrict　pedestrians’　safe　movement　efficiency.　However,　the　dynamics　of　a　heterogeneous　crowd　involving　luggage-laden　pedestrians　in　merging　flow　have　not　been　well　explained.　Therefore,　this　study　aims　to　examine　the　impacts　of　the　mixture　ratio　of　luggage-laden　pedestrians　(i.e.,　0,　20%　and　50%)　and　merging　angles　(i.e.,　45°,　60°,　90°　and　120°)　on　the　movement　of　pedestrian　merging　flow.　The　software　of　PeTrack　is　employed　to　extract　pedestrians’　trajectories　in　video　recordings.　Then,　the　temporal　features,　fundamental　diagrams,　passing　performance,　spatial　distribution　and　crowd　danger　are　analyzed.　Results　reveal　that　luggage-laden　pedestrians　have　a　negative　influence　on　merging　flow.　Specifically,　the　average　passing　time　in　each　scenario　approximately　linearly　increases　with　the　increasing　number　of　luggage-laden　pedestrians.　Given　the　temporal　features　and　fundamental　diagrams,　the　density　and　flow　after　merging　reduce　with　the　increasing　percentage　of　pedestrians　with　luggage.　The　distribution　of　density　is　imbalanced　before　merging　in　two　branches.　The　speed　of　pedestrians　after　merging　is　higher　than　that　before　merging.　Considering　the　average　passing　time,　time　headway　and　spatial　distribution,　it　is　found　that　the　traffic　efficiency　is　better　under　angle　45°.　Finally,　crowd　danger　is　obtained　to　explore　intrinsic　risk　in　the　crowd　involving　luggage-laden　pedestrians.　It　is　hoped　that　these　findings　will　be　helpful　for　improving　traffic　efficiency　of　pedestrian　merging　flow　and　providing　crowd　management　strategies.　©　2023　Elsevier　B.V.