Single-crystal　lanthanum　hexaboride　(LaB6)　is　a　functional　ceramic　with　a　low　work　function,　strong　resistance　to　ion　bombardment,　reasonable　conductivity,　and　low　evaporation　rate.　This　study　explored　the　use　of　a　femtosecond　laser　combined　with　electrochemical　etching　to　prepare　a　microtips　array　on　the　(100)　crystal　plane　of　a　single-crystal　LaB6　ceramic.　The　ablation　threshold　of　single-crystal　LaB6,　processed　using　a　femtosecond　laser,　was　studied　in　addition　to　the　microstructure　and　field　emission　properties　of　the　sample.　The　study　results　proved　that　selecting　a　peak　laser　fluence　F-0　of　9.9　J/cm(2)　could　help　avoid　the　thermal　ablation　of　the　microtips　array.　The　phase,　crystal　structure,　and　elemental　composition　of　the　microtips　array　on　the　single-crystal　LaB6　were　unchanged.　The　prepared　microtips　array　of　a　field　emitter　had　a　curvature　radius,　height,　and　minimum　spacing　of　0.4,　8,　and　20　mu　m,　respectively.　The　field　emission　test　results　showed　that　the　starting　electric　field　strength　and　field-emission　current　density　were　2.45　V/mu　m　and　2.07　A/cm(2),　respectively,　when　the　applied　electric　field　strength　was　5.2　V/mu　m.　In　addition,　the　field　enhancement　factor　was　1493,　indicating　an　excellent　field　emission　stability.