The invention relates to a processing method of thin-shell walnuts. The method is characterized in that high-quality thin-shell walnuts which are uniform in size, complete and uniform and consistent in color are selected as raw materials, the thin-shell walnuts are pre-roasted, the temperature of the thin-shell walnuts rises, then the thin-shell walnuts are impregnated to be tasty, and the thin-shell walnuts are salted, baked and finally cooled to the room temperature. By improving the pre-roasting, impregnating, salting and roasting process, the thin-walnuts can be tasty without breaking the shell, the bitterness of the walnuts can be eliminated, the taste of the walnut flesh is uniform and consistent, and the thin-walnuts produced in the method are crispy, delicious and high in nutrition value.