In　order　to　investigate　the　heat　transfer　characteristics　of　mixed　molten　salt,　an　experimental　setup　for　the　submerged　jet　impingement　has　been　established　in　this　paper.　Firstly,　an　experimental　investigation　on　heat　transfer　of　submerged　jet　impingement　with　water　as　working　fluid　was　carried　out　to　verify　reliability　of　experimental　method.　A　good　consistence　was　found　between　experimental　results　and　those　classical　correlations　from　references　for　stagnation　heat　transfer,　which　indicate　the　reliability　and　accuracy　of　experimental　method.　On　the　basic　of　ensuring　the　reliability　of　experiment,　a　series　of　studies　on　jet　impingement　experiments　were　carried　out　with　new　mixed　molten　salt.　The　results　indicated　that　effect　of　submerged　jet　impingement　heat　transfer　enhanced　gradually　with　the　increase　Reynolds　number　and　the　heat　transfer　characteristics　at　the　stagnation　are　analogous　with　the　water　in　the　scope　of　experimental　investigations.　Further,　a　correlation　about　quaternary　mixed　molten　salt　was　proposed　based　on　experimental　data.　At　same　Reynolds　number,　the　Nusselt　number　of　mixed　molten　salt　is　obviously　higher　than　that　of　water　at　stagnation　zone　because　of　its　higher　Prandtl　number　and　becomes　lower　than　water　at　larger　radial　distance　due　to　its　higher　viscosity.　The　results　indicated　that　thermophysical　properties　of　working　fluid　have　an　enormous　influence　on　the　Heat　transfer　performance.　The　experimental　results　in　this　paper　provide　a　necessary　technical　guarantee　for　the　study　of　heat　transfer　of　the　high　temperature　fluid