The two-component waterbome polyurethane coatings with good workability were prepared by using walerborne hydroxyacrylic acid dispersions as flm formers.The effects of waterborne hydroxy acrylic resin,polyisocyanate curing agent,defoaming agent and rheological addive on the painting properies of panel-type radialtor were discussed in delail.The results showed when choosing the high hydroxyl waterborme acrylic resin with long activation period,moderate waler supply and exellent performance,combined with HDI/IPDI as 1:1 polyisoceyanate curing agent,the polyurethane coating with 8 hours activation period were obtained.When the polyether modifed silicone and silicone defoaming agent was 1:3,inorganic concave and convex rod soil was the rheological agent,associated polyurethane was thickener,the obtained polyurethane coating had good performance in the panel-type radiator spraying.