To determine the optimum working parameters of the egg orientation, the influence of convey roller’s material and roughness on egg’s directional movement was studied. The results showed that the horizontal deflection angle of the egg was the largest on the aluminum alloy roller and the smallest on the nylon roller. Convey rollers of different materials had no significant influence on the axial displacement and the guiding distance of guide rod. The surface roughness of carbon steel roller, aluminum alloy roller and organic glass roller had few effects on the rolling distance, the effect of nylon roller on that was relatively obvious. The change of the egg’s side-slip angle on the nylon roller, the carbon steel roller and the aluminum alloy roller was not obvious, but that on the organic glass roller was relatively obvious. The optimal parameters were determined: the material was carbon steel roller, surface roughness was level 2, the diameter was 40 mm, the spacing was 15 mm, the rotate speed was 70 mm/s and guide rod angle was 30°.