Solar　thermal　electricity　generating　technology　is　an　alternative　solution　to　energy　crises　and　environmental　problems,　which　has　caused　wide　concern　in　recent　decades.　In　this　paper,　a　molten　salt　parabolic　trough-based　concentrated　organic　Rankine　cycle　system　is　proposed　and　investigated.　A　quadribasic　nitrate　salt　with　low　melting　temperature　is　employed　as　a　heat　transfer　and　storage　medium.　A　stable　heat　transfer　and　economic　model　is　established　with　Matlab.　The　radial　and　axial　temperature　distributions　in　the　collector　tube　are　obtained,　and　the　impact　of　condensation　and　evaporation　temperatures　on　the　heat　transfer　area　is　analyzed.　Results　show　that　the　temperature　along　the　axial　direction　linearly　increases,　and　the　temperature　at　the　collector　tube　exit　decreases　with　the　increase　of　molten　salt　mass　flow　rate.　The　maximum　temperature　difference　along　the　radial　direction　of　the　collector　tube　happens　in　the　annular　gap.　Heat　transfer　and　thermodymanic　analysis　indicates　that　condensation　temperature　has　a　more　evident　effect　on　heat　transfer　area　than　that　of　evaporation　temperature.　An　increase　in　condensation　temperature　leads　to　a　decrease　in　the　evaporator　area,　the　condenser　area　increases,　and　the　total　area　decreases.　Economic　analysis　indicates　the　collector　cost　plays　a　predominant　role　in　total　capital　costs,　and　decreasing　molten　salt　mass　flow　rate　can　considerably　reduce　collector　cost.　Levelized　energy　cost　sensitivity　analysis　indicated　that　operation　time　per　year　has　a　more　evident　effect　than　that　of　the　four　factors.　Heat　transfer　and　economic　analysis　on　the　system　helps　in　the　selection　of　operation　parameters.