The　main　research　work　of　this　paper　is　based　on　the　Discrete　Element　Method　(DEM)　and　completed　by　the　platform　of　particle　flow　software　PFC2D.　A　numerical　calculation　model　is　established　based　on　the　motion　equation　and　the　force　equation　between　soil　particles　which　can　consider　the　interparticle　rolling　resistance　and　particle　shape　effect.　In　addition,　interparticle　rolling　resistance　is　introduced　and　four　particle　groups　with　different　shapes　are　constructed　through　the　custom　language　of　FISH　and　the　command　of　CLUMP.　Moreover,　through　a　series　of　biaxial　compression　tests,　the　influences　of　interparticle　rolling　resistance　and　particle　shape　effect　on　the　macroscopic　and　microscopic　mechanical　characteristics　of　soil　are　analyzed.　The　influence　of　them　on　the　deviatoric　stress　and　the　volume　strain　of　soil　are　compared　and　analyzed.　Finally,　through　an　engineering　case　of　ground　collapse　caused　by　pipeline　leakage,　the　influences　of　interparticle　rolling　resistance　and　particle　shape　effect　on　the　development　process　of　ground　collapse　are　discussed.　The　results　show　that　interparticle　rolling　resistance　can　enhance　the　strength　of　deviatoric　stress　of　soil,　and　the　influence　on　the　macroscopic　and　microscopic　mechanical　properties　of　soil　is　consistent.　The　influence　trends　of　particle　shape　effects　on　the　deviatoric　stress　of　soil　are　the　same　as　that　of　interparticle　rolling　resistance　and　the　influence　of　both　on　the　deviatoric　stress　of　soil　is　similar.　However,　the　influences　of　interparticle　rolling　resistance　and　particle　shape　effect　on　the　peak　value　of　volume　strain　of　soil　are　different.