The　characters　of　stimulated　Raman　scattering　of　BaWO4　crystal　excited　by　a　picoseconds　laser　at　1064　nm　are　studied　based　on　optical　parametric　amplification　(OPA).　Up　to　six-order　Stokes　components　and　five-order　anti-Stokes　components　are　observed.　The　SRS　components　are　amplified　by　an　OPA　and　the　wavelength　tunable　range　from　411　to　2594　nm　is　achieved　with　a　maximum　conversion　efficiency　of　38%　using　the　OPA　stage.