Based　on　fractal　theory,　in　full　consideration　of　the　deformation　of　asperities　in　contact　surface,　a　fractal　network　model　for　thermal　contact　resistance　was　established,　using　this　model　to　compare　temperature　field　of　high-speed　motorized　spindle　system　with　and　without　thermal　contact　resistance,　which　demonstrate　the　importance　of　thermal　contact　resistance　to　the　temperature　field　of　motorized　spindle　system.