Beryllium-free　nonlinear　optical　(NLO)　crystal　K3Ba3Li2Al4B6O20F　(KBLABF)　is　a　newly　reported　promising　candidate　in　the　generation　of　the　significant　UV　coherent　light.　A　17　x　12　X　8　mm(3)　bulk　single　crystal　is　successfully　grown　with　an　optimized　flux　molar　ratio.　The　crystal　specific　heat　increases　from　0.65.J.g(-1).degrees　C-1　to　0.96.J.g(-1).degrees　C-1　with　the　increasing　temperature.　Meanwhile,　the　alpha-direction　thermal　conductivity　of　KBLABF　is　1.11　W.m(-1).K-1　at　25　degrees　C,　which　is　also　equivalent　to　that　of　the　famous　NLO　crystal　beta-BaB2O4　(1.25　W.m(-1).K-1).　The　KBLABF　crystal　has　moderate　Vickers　hardness　along　the　alpha-axis　and　c-axis　(165.1　HV0.1　and　257.7　HV0.1,　respectively),　which　indicates　it　is　easy　to　be　cut　and　polished.　Remarkably,　the　laser　damage　threshold　of　KBLABF　is　3.32　GW.cm(-2)　(1064　nm,　8　ns),　which　even　exceeds　those　of　some　famous　commercial　NLO　crystals.　This　result　demonstrates　that　KBLABF　is　suitable　for　high-power　NLO　applications.　This　work　will　establish　the　foundation　for　the　future　NLO　applications　of　the　KBLABF　crystal.