The influence of spiral angle, feeding speed and milling depth on the surface roughness of the laminate floor was investigated using an orthogonal experiment design. The experimental results showed: the surface roughness decreased with the increase of spiral angles, while the surface roughness increased with the increasing feeding rate and milling depth. The spiral angle of cutters had the greatest influence on the surface roughness, followed by milling depth and feeding rate respectively. The optimal cutting parameters for laminate flooring spiral milling were identified when the spiral angle, feeding speed, and milling depth were 70°, 60 m/min, and 0.4 mm respectively, aiming at greater cutting efficiency and quality.