Black　phosphorene(BP)and　its　analogs　have　attracted　intensive　attention　due　to　their　unique　puckered　structures,anisotropic　characteristics,and　negative　Poisson＇s　ratio.The　van　der　Waals(vdW)heterostructures　assembly　by　stacking　different　materials　show　novel　physical　properties,however,the　parent　materials　do　not　possess.In　this　work,the　first-principles　calculations　are　performed　to　study　the　mechanical　properties　of　the　vdW　heterostructure.Interestingly,a　near-zero　Poisson＇s　ratio　vzx　is　found　in　BP/SnSe　heterostructure.In　addition,compared　with　the　parent　materials　BP　and　SnSe　with　strong　in-plane　anisotropic　mechanical　properties,the　BP/SnSe　heterostructure　shows　strongly　suppressed　anisotropy.The　results　show　that　the　vdW　heterostructure　has　quite　different　mechanical　properties　compared　with　the　parent　materials,and　provides　new　opportunities　for　the　mechanical　applications　of　the　heterostructures.