Based　on　the　parabolic　trough　collector　designed　and　constructed　by　ourselves,　a　test　band　is　established　for　evaluating　the　thermal　performance　of　the　parabolic　trough　collector.　Experiments　on　the　thermal　performance　of　the　parabolic　trough　collector　have　been　done　in　detail.　Experimental　results　show　a　high　thermal　performance　of　the　parabolic　trough　collector.　Overall　efficiency　of　the　parabolic　trough　collector　exceeds　70%,　which　means　that　thermal　performance　of　the　parabolic　trough　collector　is　higher,　steel　structure　performance　of　the　collector　is　higher,　and　precision　of　tracking　and　driving　system　is　higher.　Thermal　performance　of　parabolic　trough　receivers　used　degraded　rapidly,　which　reduces　the　overall　thermal　performance　of　the　parabolic　trough　collector　gradually.