Based　on　the　microscopic　morphology　and　size　distribution　of　the　iron　oxide　scales　measured　in　our　erosion　tests,　109　micro　flaky　particles　were　elaborately　generated　by　MATLAB　codes　to　ensure　that　the　morphology　and　size　distribution　were　basically　consistent　with　the　observations　under　the　microscope.　Furthermore,　based　on　the　nonlinear　explicit　dynamics　software　ABAQUS/explicit,　the　numerical　simulations　of　the　erosion　mechanism　of　multi-particles　on　the　blade　substrate　1Cr12W1MoV　in　a　high-parameter　turbine　were　performed.　Compared　with　the　experimental　data,　the　influence　of　the　particle　shape,　particle　size,　impact　velocity　and　particle　roundness　on　the　erosion　rate　was　studied　in　detail.　The　results　show　that　the　shape　of　the　particles　has　a　great　effect　on　the　erosion　rate.　The　impact　angle　corresponding　to　maximum　erosion　rate　of　the　flaky　particles　is　around　24-30.　While　the　equivalent　maximum　impact　angle　is　around　45-60　for　spherical　particles.　The　effect　of　micro-cutting　on　erosion　is　greater　than　that　of　extrusion-forging　for　flaky　particles.　While　the　influence　of　micro　extrusion　and　forging　on　erosion　is　huger　than　that　of　micro-ploughing　for　spherical　particles　according　to　the　morphologies　results.　In　addition,　the　higher　the　roundness　of　the　flaky　particles,　the　lower　the　erosion　rate.　When　the　sphericity　of　the　erodent　particles　entering　the　cascade　passage　reaches　0.5856　or　more,　the　erosion　rate　will　be　greatly　reduced,　thereby　significantly　alleviating　the　erosion　damage　of　the　blade.　The　results　of　this　paper　will　provide　theoretical　basis　and　technical　support　for　further　understanding　of　the　erosion　mechanism　of　typical　blade　materials　in　dust-laden　turbines.　(C)　2019　Elsevier　B.V.　All　rights　reserved.