This　article　constructs　a　structural　of　interference　locking　hydraulic　cylinder　and　explains　its　working　principle.　Establish　a　finite　element　simulation　model　for　the　interference　locking　hydraulic　cylinder,　and　analyse　the　stress-strain　characteristics　of　the　cylinder　barrel/locking　sleeve.　The　results　show　that　the　maximum　equivalent　Von　Mises　stress　of　the　cylinder　barrel　and　locking　sleeve　in　the　locked　state　are　466.77　MPa　and　159.7　MPa,　respectively.　The　radial　deformation　of　the　middle　fitting　section　of　the　cylinder　barrel　is　evenly　distributed,　but　there　are　slight　wave　fluctuations.　The　average　radial　deformation　of　the　middle　fitting　section　of　the　cylinder　barrel　is　about　0.1366mm.　The　average　contact　stress　of　the　cylinder　barrel/locking　sleeve　contact　surface　is　44.438　MPa,　and　edge　effects　occur　within　a　range　of　approximately　10　mm　from　the　contact　edges　on　both　sides.　There　are　sticking　zone　and　sliding　zone　on　the　contact　surface　of　the　cylinder　barrel/locking　sleeve,　without　any　near　zone.　In　addition,　this　paper　also　systematically　studies　the　influence　of　axial　load　and　radial　load　on　the　equivalent　Von　Mises　stress,　contact　pressure,　sliding　distance　of　the　interference　fit,　providing　technical　support　for　the　development　and　application　of　the　interference　locking　hydraulic　cylinder.　©　2023　IEEE.