Based　on　the　parabolic　trough　collector　developed　by　ourselves,　an　experiment　system　is　established　to　evaluate　the　thermal　performance　of　the　parabolic　trough　collector.　Experiments　on　the　thermal　performance　of　the　parabolic　trough　collector　have　been　carried　out　at　different　thermal　and　fluid　conditions.　Experimental　results　show　that　peak　efficiency　of　the　parabolic　trough　collector　exceeds　70%　at　a　average　thermal　oil　temperature　of　305　degrees　C　and　is　close　to　that　level　of　the　commrcialized　EUROTRGH　collectors,　which　implies　that　steel　structure　of　the　collector　is　good　and　error　of　the　tracking　and　driving　system　is　very　low.