In　order　to　protect　the　visual　effect　of　3D　model,　watermarking　algorithm　should　have　good　invisibility,　thus　a　novel　frequency-domain　watermarking　method　is　proposed　in　this　paper.　Robust　regions　of　3D　model　are　selected　as　the　watermarking　regions　in　this　algorithm,　and　watermarking　regions　are　transformed　into　two-dimensional　images　depending　on　vertices　distribution.　Then　the　two-dimensional　images　are　transformed　into　wavelet　transform　images　by　using　wavelet　transform　algorithm　and　the　watermark　is　embedded　in　low　frequency　coefficients　of　wavelet　transform　images.　The　experimental　results　show　that　the　watermarking　algorithm　in　this　paper　has　high　invisibility,　and　can　resist　common　attacks　such　as　noise,　rotation,　cropping　and　scaling.　©　Published　under　licence　by　IOP　Publishing　Ltd.