19　kinds　of　different　ratio　of　binary　mixed　molten　salt　have　been　formulated,　and　the　formulation　of　a　low　melting　point　binary　molten　salt　has　been　exploited　and　its　primary　thermophysical　properties　were　presented　here.　The　eutectic　temperature　of　the　selected　binary　salt　mixture　was　determined　to　be　116.9　degrees　C.　Further　the　decomposition　point,　specific　heat,　density,　viscosity,　thermal　conductivity　and　corrosion　were　determined　respectively.　Sensible　thermal　storage　cost　of　the　novel　eutectic　mixture　was　found　to　be　lower　than　that　of　conventional　solar　salt　and　HITEC　salt.　The　performance　of　the　binary　salt　mixture　taken　at　different　stages　during　the　test　of　1200-h　exposure　to　constant　high　temperature　was　discussed　based　on　the　results　obtained　from　long-term　thermal　stability　studies.　The　results　show　that　thermodynamic　properties　of　the　molten　salt　show　perfect　repeatability　before　and　after　the　experiments,　and　most　variations　rate　of　the　thermal　physical　properties　is　within　10%,　which　can　be　considered　as　an　implication　that　the　candidate　has　good　thermal　stability.　Therefore,　this　new　kind　of　binary　molten　salt　thermal　storage　materials　is　more　competitive　and　promising　to　be　used　in　solar　power　generation　systems　while　providing　a　comprehensive　data　for　its　engineering　application　and　theoretical　research.