The invention provides a preparation method for producing compound seasoning powder by grinding an edible mushroom material. The preparation method is characterized by taking fresh edible mushrooms asa main raw material of the compound seasoning powder; the preparation method comprises the following steps in sequence: A1, drying the fresh edible mushrooms in a drying machine until the moisture content is 3 percent or less than 3 percent; A2, after drying, putting the edible mushrooms into a pulverizer, and pulverizing until the size is 200 meshes; A3, pouring the pulverized edible mushrooms and ingredients into a V-shaped mixing machine and uniformly mixing. The preparation method for producing the compound seasoning powder by grinding the edible mushroom material, provided by the invention, is simple, and the natural property and nutrients of seasonings are easy to improve.