A　low-cost　mixed　nitrate　with　low　melting　point　and　high　decomposition　temperature　was　provided.　The　melting　point,　decomposition　temperature,　latent　heat,　specific　heat,　density,　thermal　diffusivity,　thermal　conductivity　and　thermal　stability　were　tested　and　analyzed,　and　base　on　the　experimental　data,　the　heat　storage　cost　is　calculated.　The　results　show　that　the　low　cost　mixed　nitrate　has　a　significant　advantage　on　the　melting　point,　decomposition　temperature,　cost　and　thermal　stability,　have　the　potential　using　as　heat　transfer　and　energy　storage　material　in　solar　thermal　power　plants　and　nuclear　power　plants.　©　2020,　Editorial　Board　of　Acta　Energiae　Solaris　Sinica.　All　right　reserved.