Finite　element　(FE)　analysis　was　used　in　the　simulation　of　constrained　groove　pressing　(CGP)　of　Cu-38Zn　alloy　by　ABAQUS　software.　Microstructure　and　hardness　of　Cu-38Zn　alloy　were　studied.　The　relationship　between　the　equivalent　strain　of　the　specimen　deformed　by　mould　pressing,　microstructure　and　mechanical　characteristics　of　Cu-38Zn　alloy　was　investigated.　The　results　show　that　the　distribution　of　the　equivalent　strain　is　non-uniform　in　the　samples　subjected　to　CGP,　which　influences　the　corresponding　non-uniformity　in　the　microstructure　and　hardness　of　Cu-38Zn　alloy.　With　the　increasing　of　the　groove　pressing　cycles,　the　grains　of　Cu-38Zn　alloy　become　finer　and　the　hardness　increases.　The　value　of　the　equivalent　strain　in　the　Cu-38Zn　alloy　specimen　affects　the　plastic　deformation　mechanism　of　the　alloy　subjected　to　CGP.