Selenium-rich hericium erinaceus cultivation material and preparation method thereof

The invention relates to a selenium-rich hericium erinaceus cultivation material and a preparation method thereof. The selenium-rich hericium erinaceus cultivation material is prepared from raw materials as follows: 50%-60% of cottonseed hulls, 25%-35% of wheat straw, 8%-15% of selenium-rich alfalfa meal, 0.8%-1.2% of gypsum powder, 0.2%-0.8% of calcium superphosphate, 0.1%-0.3% of monopotassium phosphate and 0.2%-0.5% of magnesium sulfate. According to the selenium-rich hericium erinaceus cultivation material, the raw material ratio is reasonable, nutrition is balanced, the utilization ratio of selenium is high, C/N (carbon to nitrogen ratio) meets cultivation requirements of hericium erinaceus, the selenium content of hericium erinaceus produced by the cultivation material with a conventional bag type cultivation method reaches 0.15 mg/kg-3.0 mg/kg and is 10-200 times of that of common hericium erinaceus, and selenium-rich hericium erinaceus has abundant nutrition, is very good green health food with a selenium supplement function, and has wide development prospect.