In　order　to　obtain　high　average　power　and　wide　spectrum　picosecond　laser,　and　also　to　reduce　the　volume　of　the　whole　optical　system,　we　study　the　high　power　picosecond　pumped　stimulated　Raman　scattering　(SRS)　oscillation　cavity　theoreticaly　and　experimentally　in　this　paper.　By　analyzing　the　accompanying　processes　of　SRS,　the　various　nonlinear　effects　in　Raman　crystal　under　high　power　pumped　condition　are　simplified　as　SRS　under　the　condition　of　simple　equivalent　thermal　lens　and　through　the　experimental　measurement　divergence　angle　of　single　pass　of　SRS　is　obtained,　from　which　the　Raman　crystal　equivalent　lens　radius　is　calculated.　On　the　basis　of　stable　and　efficient　design　theory　of　SRS　oscillation　cavity,　the　excellent　performance　of　the　cavity　design　is　verified　by　the　comparing　experiments.　The　high　power　picosecond　pumped　SRS　system　can　produce　the　maximum　power　of　1.32　W,　covering　532　nm　to　698　nm　laser　line,　which　is　the　highest　average　power　of　the　picosecond　Raman　laser　up　to　date.　©　2016,　Science　Press　in　China.　All　right　reserved.