本发明涉及一种聚氨酯光学材料树脂制备方法。所述方法将组分A与组分B混合后聚合，得到镜片的白浊发生率和光学形变发生率减少的光学材料树脂。组分A为异氰酸酯类化合物，组分B为硫醇类化合物，其中，组分A异氰酸酯中腈基杂质含量小于300ppm。

The invention relates to a preparation method of a polyurethane optical material resin. According to the method, a component A and a component B are mixed and polymerized to obtain an optical materialresin capable of reducing white turbidity occurrence rate and optical deformation occurrence rate of a lens, wherein the component A is an isocyanate compound, the component B is a thiol compound, and the content of the nitrile group impurities in the isocyanate of the component A is less than 300ppm.