Molten　fluoride　is　considered　as　an　attractive　heat　transfer　and　storage　medium　in　advanced　energy　utilization　facilities,　but　it　is　short　of　the　necessary　thermal　and　transport　properties　at　high　temperature.　In　this　paper,　the　thermal　and　transport　properties　of　the　binary　LiF-KF　mixtures　at　1073-1473　K　are　obtained　by　classical　molecular　dynamics.　The　deviation　of　simulated　thermal　conductivity　of　binary　LiF-KF　at　1073　K　from　experimental　value　is　less　than　19%.　Moreover,　the　deviation　of　simulated　viscosity　of　pure　LiF　at　different　temperatures　from　experimental　value　is　around　10　%.　It　is　indicated　that　reverse　non-equilibrium　molecular　dynamics　(RNEMD)　is　acceptable　for　describing　fluoride　salts.　An　exponential　correlation　is　established　between　molar　fraction　of　LiF　and　thermal　conductivity　at　different　temperatures.　Furthermore,　the　macroscopic　thermal　and　transport　properties　correlated　with　local　structure　are　analyzed,　especially　the　dependence　of　local　structure　on　temperature　and　composition　of　LiF　is　discussed　deeply.　With　temperature　increasing,　ion　clusters　are　considered　to　be　formed　and　overall　structure　become　loose,　which　leads　to　reductions　in　density,　thermal　conductivity　and　viscosity.　An　increase　in　composition　of　LiF　results　in　higher　specific　heat　capacity,　thermal　conductivity　and　viscosity,　which　is　related　to　the　reduction　of　Li-Li　bond　length　and　the　enhancement　of　interactions　between　F-.　The　comparison　of　properties　enhancement　of　different　compositions　is　completed　through　the　analysis　of　the　synergy　coefficient　of　macroscopic　properties.　This　work　provides　the　basic　data　for　the　accurate　design　of　hightemperature　heat　transfer　system.