In order to study the influence of polydimethylsiloxane (PDMS) molecular weight, functionality and addition amount on the antifouling performance of UV-curable polyurethane acrylate easy-to-clean coatings. Using polyethylene glycol (PEG), isophorone diisocyanate (IPDI), hydroxyl-terminated PDMS and pentaerythritol triacrylate (PETA) as raw materials, a silicone-modified polyurethane acrylate easy-to-clean resin was prepared by a one-pot method and UV curing to get an easy-to-clean coating. The coating added with 5 000 molecular weight PDMS (PDMS-5000) has higher contact angle, lower sliding angle, better oily marker handwriting shrinkage and wear resistance than the coating with 1 000 molecular weight PDMS (PDMS-1000) performance, but the transmittance of the coating is significantly reduced; the coating with PDMS (PDMS-B) with double hydroxyl end cap has better shrinkage effect of oily marker pen than the coating with PDMS (PDMS-A) with single hydroxyl end cap and wear resistance. As the addition of PDMS in the coating increases from 0.5wt.% to 2.0wt.%, the anti-fouling performance gradually improves. At the same time, according to XPS analysis, when the addition of PDMS in the coating increases to 2wt.% , the Si content is close to saturation, and the anti-fouling performance reaches the best. The easy-to-clean coating still has the effect of shrinking the handwriting of the oily marker pen even after 1 000 abrasion cycle tests. The AFM characterization test shows that the prepared smooth and easy-to-clean coating surface has very low roughness. The PDMS-B modified urethane acrylate coating has better marker handwriting shrinkage and abrasion resistance than the PDMS-A modified urethane acrylate coating, and the PDMS-5000 modified urethane acrylate coating is better than the PDMS-5000 modified urethane acrylate coating. PDMS-1000 modified polyurethane acrylate coating has better easy-to-clean performance. When the amount of PDMS added was increased from 0.5wt.% to 2.0wt.%, the hydrophobic and oleophobic properties of the coating gradually improved.