In　this　paper,　plasma　transferred　arc　welding　(PTA)is　used　to　prepare　high　boron　clad　layer　on　hydraulic　support　piston　rod　surface.　The　microstructural,　component　distribution,　phase　constitution,　microhardness,　wear　resistance　and　corrosion　resistance　are　analyzed.　The　results　show　that　four　high　boron　clad　layers　is　formed　well　and　no　cracking,　microstructure　homogeneity　are　found.　With　the　increase　of　the　boron　content,　the　microhardness　of　clad　layer　increases　gradually　with　the　maximum　440　HV20,　and　wear　resistance　increases　first,　then　decreases.　In　salt　spray　test,　No.1　and　No.2　clad　layers　don＇t　have　corrosion　points　after　480　hours,　which　shows　the　good　corrosion　resistance.　Finally　it　is　concluded　that　No.2　wire　has　high　corrosion　resistance　which　has　well　microhardness　and　wear　resistance　at　the　same　time.　It　meets　the　demand　of　hydraulic　support　piston　rod.　©　2017,　Editorial　Board　of　Transactions　of　the　China　Welding　Institution,　Magazine　Agency　Welding.　All　right　reserved.