Recently,　the　effect　of　temperature　on　the　mechanical　property　(the　Young＇s　modulus)　of　the　single-layer　molybdenum　disulfide　(SLMoS2)　is　shown　to　be　insignificant,　which　is　obviously　incompatible　with　the　previously　published　result,　i.　e.　the　Young＇s　modulus　of　SLMOS2　decreases　monotonically　as　temperature　increases.　Aiming　at　clarifying　the　relationships　between　the　mechanical　properties　of　the　single-layer　molybdenum　disulfide　(SLMoS2)　along　the　armchair　(AC)　and　zigzag　(ZZ)　directions　and　the　temperature,　classical　molecular　dynamics　(MD)　simulations　are　performed　to　stretch　the　SLMoS2　along　the　AC　and　ZZ　directions　at　the　temperatures　ranging　from　1　K　to　800　K　by　using　the　Stillinger-Weber　(SW)　interatomic　potentials　in　this　paper.　The　mechanical　properties　of　SLMoS2　at　the　temperatures　ranging　from　1　K　to　800　K,　including　ultimate　strength,　ultimate　strain,　and　Young＇s　Modulus,　are　calculated　based　on　the　stress-strain　results　obtained　from　the　simulations.　Results　are　obtained　and　given　as　follows.　(1)　The　mechanical　properties　of　the　SLMoS2,　including　the　ultimate　strength　and　Young＇s　modulus,　are　found　to　monotonically　decrease　as　temperature　increases.　Increasing　the　temperature,　the　ultimate　strength　of　SLMoS2　in　the　AC　direction　drops　faster　than　in　the　ZZ　direction,　whereas　the　Young＇s　modulus　of　SLMoS2　in　the　ZZ　direction　decreases　quicker　than　in　the　AC　direction,　which　means　that　the　chirality　effect　on　the　ultimate　strength　is　remarkably　different　from　the　Young＇s　modulus　of　SLMoS2.　However,　the　ultimate　strain　in　the　ZZ　direction　at　the　temperatures　in　a　range　from　1　K　to　800　K　is　close　to　that　in　the　AC　direction,　which　means　that　the　effect　of　chirality　on　the　ultimate　strain　is　insignificant.　(2)　Unlike　the　published　results　in　the　literature,　the　phase　transition　of　SLMoS2　is　found　to　only　occur　at　a　temperature　of　1　K　and　at　the　moment　of　initial　crack　formation　as　tensiled　along　the　ZZ　direction,　and　the　new　phase　of　quadrilateral　structure　keeps　stable　after　unloading.　(3)　The　linear　thermal　expansion　coefficients　along　the　ZZ　and　AC　directions　are　also　measured,　the　magnitudes　of　which　are　found　to　be　consistent　with　the　published　experimental　results.　Our　simulation　results　support　the　viewpoint　that　the　effect　of　the　temperature　on　the　mechanical　property　of　SLMoS2　is　significant,　and　the　SLMoS2　can　be　regarded　as　an　anisotropic　material　as　the　chirality　effect　cannot　be　ignored.　The　linear　thermal　expansion　coefficients　obtained　with　MD　simulation　are　all　in　good　agreement　with　the　experimental　data.　©　2016　Chinese　Physical　Society.