This　paper　presents　an　8　mJ　355　nm　1　kHz　burst-mode　picosecond　laser　system,　where　the　energy　of　each　subpulse　in　the　burst　mode　is　2　mJ.　Under　optimal　operational　conditions,　a　noncritical　phase-matched　LiB3O5　(LBO)　crystal　and　a　type-II　angle-　and　phase-matched　LBO　crystal　are　used　as　the　second-　and　third-harmonic　generation　crystals,　respectively.　The　largest　conversion　efficiency　from　1064　nm　to　355　nm　was　38%,　and　the　highest　output　power　at　355　nm　was　8　W;　further,　the　beam　quality　was　measured　as　M-x(2)　=　2.46　and　M-y(2)　=　2.84.