An　average　power　of　1.95　W　picosecond　radially　polarized　laser　was　obtained　with　1　064　nm　at　1　kHz,　which　based　on　an　all-solid-state　picosecond　laser　developed　independently.　The　peak　power　of　the　radially　polarized　beam　was　up　to　1.77×108　W　and　the　beam　quality　was　measured　to　be　M2=　2.95　with　the　pulse　width　11　ps,　corresponding　to　the　beam　purity　of　92%.　The　radially　polarized　seed　beam　was　obtained　by　adding　the　polarization　conversion　element　outside　the　laser　cavity.　In　addition,　the　modulation　attenuator　caused　two　different　polarization　lasers　to　output　the　same　optical　power　and　then　enter　the　subsequent　optical　system;　and　a　0.5　mm　thick　stainless　steel　was　drilled　and　grouted　by　using　the　obtained　picosecond　radially　polarized　laser　and　picosecond　linearly　polarized　laser　under　the　same　processing　parameters,　respectively.　The　difference　on　the　circularity　of　the　holes　and　the　depth　of　the　grooves　were　compared　with　each　other　when　it　was　processed　by　the　two　polarized　picosecond　lasers.　The　results　show　that　the　picosecond　radially　polarization　laser　has　better　drilling　roundness,　deeper　notch　depth　and　flatter　sidewall　of　the　groove　compared　to　the　picosecond　linear　polarization　laser　processing　results.　This　results　provides　a　reference　for　the　application　of　picosecond　radial　polarization　laser　in　the　field　of　material　processing.　©　2019,　Editorial　Board　of　Journal　of　Infrared　and　Laser　Engineering.　All　right　reserved.