Nitrate　salt　with　low　melting　point　as　heat　transfer　and　storage　fluid　simplifies　the　heat　transfer,　storage,　and　exchange　processes,　and　organic　Rankine　cycle　as　heat　and　power　conversion　system　can　realize　the　distributed　energy　supply.　This　study　experimentally　investigated　the　solar　organic　Rankine　cycle　with　parabolic　trough　concentrator　using　nitrate　salt　as　heat　transfer　and　storage　fluid,　and　the　main　problems　and　phenomena　during　the　operation　process　have　been　described　and　analyzed　in　detail.　Experimental　results　showed　that　the　temperature　difference　of　collector　tube　changes　with　direct　normal　irradiation　and　lags　behind　the　changes　of　direct　normal　irradiation.　Molten　salt　heat　storage　system　can　effectively　restrain　the　temperature　fluctuation　at　the　collector　tube　outlet.　The　abrupt　temperature　drop　at　the　evaporator　inlet　was　caused　by　the　heat　imbalance　between　R123　and　nitrate　salt　and　inappropriate　design　of　the　evaporator.　The　effects　of　expander　inlet　pressure　and　expansion　ratio　on　the　ORC　electrical　power　output　were　obtained　at　different　superheating　degrees　of　the　expander　inlet.　The　researches　on　each　component　are　instructive　to　the　technology　of　the　parabolic　trough　concentrated　solar　power　generation　system　with　molten　salt　as　heat　transfer　and　storage　fluid　and　provide　some　guides　for　the　subsequent　research.　Furthermore,　the　energy　and　exergy　analyses　on　overall　system　were　developed,　and　results　indicated　the　system　average　efficiency　can　reach　1.5%.　Novelty　statement　Experimental　study　on　parabolic　trough　concentrated　solar　ORC　system　with　nitrate　salt　as　heat　transfer　and　storage　medium　were　firstly　analyzed.　Single　screw　expander　was　firstly　applied　in　a　real　solar　thermal　power　generation　system　and　showed　a　stable　performance.　Dynamic　changes　on　the　temperatures　of　PTC,　molten　salt　tanks,　and　ORC　were　shown,　and　energy　and　exergy　analyses　on　overall　system　were　carried　on.