Based　on　the　high-temperature　high-speed　accelerated　erosion　test　facility,　systematic　solid　particle　erosion　tests　under　high　temperature　were　performed　to　six　kinds　of　nozzle　materials　of　high-parameter　steam　turbine,　and　a　microscopic　analysis　was　conducted　to　the　eroded　surface　of　specimens.　Results　show　that:　six　kinds　of　the　nozzle　substrate　exhibit　typical　erosion　characteristics　of　plastic　material.　The　maximum　erosion　rate　angle　is　in　the　range　of　(24±4)°　and　the　velocity　exponent　2.7~3,　which　are　all　higher　than　that　of　Finnie＇s　model.　Under　the　small　angle　impingement　of　oxide　particles,　the　erosion　damage　of　nozzle　was　mainly　caused　by　the　micro-cutting　of　particles.　While　under　the　large　angle　impingement,　serious　chopping　and　plastic　deformation　will　generate　on　the　surface　of　the　nozzle　by　the　impact　positive　stress　from　particles.　Through　systematic　analysis　of　the　test　results,　an　erosion　rate　model　for　predicting　the　solid　particle　erosion　of　high-parameters　steam　turbine　nozzles　was　established　based　on　the　existing　micro-cutting　erosion　model　from　Finnie.　The　results　of　the　study　will　deepen　the　high　temperature　erosion　mechanism　of　steam　turbine　nozzles,　and　provide　a　basis　for　comprehensive　prevention　of　solid　particle　erosion　and　predicting　the　high　efficiency　service　life　of　nozzles.　©　2014　Chinese　Society　for　Electrical　Engineering.