In　this　paper,　we　carried　out　a　series　of　experiments　on　fouling　characteristics　of　6　kinds　of　spiral-grooved　tubes　to　investigate　the　impact　of　hardness,　temperature　and　structure　parameters　of　cold　water　on　fouling　characteristics　of　spiral-grooved　tube.　Experimental　results　showed　that　when　cold-water　temperature　decreased,　fouling　resistance　of　spiral-grooved　tube　also　decreased.　Asymptotic　fouling　resistance　increased　accompanied　with　increase　of　cold-water　hardness.　However,　the　asymptotic　fouling　resistance　appeared　to　reduce　when　hardness　increased　to　some　extent.　Geometric　parameters　of　spiral-grooved　tubes　had　remarkable　effect　on　fouling　resistance,　which　showed　a　tendency　of　decrease　with　increase　of　groove　depth　and　decrease　of　pitch.　In　this　study,　the　minimum　asymptotic　fouling　resistance　was　observed　in　the　spiral-grooved　tube　with　small　pitch　and　large　groove　depth.