To　analyze　the　viscous　dissipation　effects　of　high　viscosity　ink　fluid　in　the　microchannels　between　the　steel　roller　and　the　rubber　roller　of　the　offset　press,　the　influence　factors　of　the　viscous　dissipation　effects　were　first　analyzed.　Then,　the　fluid　simulation　software　Fluent　was　used　to　study　the　heat　generation　based　on　viscous　dissipation　of　high　viscosity　ink　fluid　in　microscale.　An　ink　fluid　simulation　model　was　established　in　detail　considering　the　viscous　dissipation　effects,　and　the　characteristics　of　the　ink　fluid　including　the　distributions　of　pressure,　velocity　and　temperature　were　obtained.　The　simulation　results　of　diverse　channel　scales　and　different　ink　viscosities　were　comparatively　analyzed.　In　the　meanwhile,　combined　with　theoretical　analysis,　the　impact　of　channel　dimensions　and　ink　viscosity　on　viscous　dissipation　was　finally　obtained.　With　the　decrease　of　the　channel　scale,　the　flow　field　temperature　rises.　Besides,　the　relationship　between　the　highest　temperature　of　the　flow　field　and　channel　dimensions　are　approximately　nonlinear　exponential.　With　the　increase　of　ink　viscosity,　the　ink　flow　field　temperature　also　rises.　Additionally,　the　highest　temperature　of　the　flow　field　and　the　ink　viscosity　are　approximately　linear　relationship.　©　2017,　Editorial　Department　of　Journal　of　Beijing　University　of　Technology.　All　right　reserved.