Northeast auricularia auricula can be listed in June-August every year. Affected by the cold local temperature in Northeast China, the picking period is only three months from June to August in a year. Compared with the ground-planted auricularia auricula, the auricularia auricula in plastic shed has the characteristics of land saving, water saving, labor saving, easy picking, no pollution and good benefit. The picking period is about one month earlier than that of the ground-planted auricularia auricula, and the grown auricularia auricula has good ear shape and good quality, which is favored by ear farmers and consumers more and more, and has broad market prospects. Auricularia auricula is rich in protein, which is especially suitable for patients with hypertension and hyperlipidemia. Eating more Auricularia auricula can not only anticoagulate and reduce blood viscosity, but also make up for its insufficient supply in protein. It is a pollution-free pure green food, so Auricularia auricula is praised by nutritionists as "the meat in vegetarian diet" and "the king in vegetarian diet". Auricularia auricula is the food with the highest iron content and the best iron supplement effect among all kinds of foods. Traditional Chinese medicine believes that auricularia auricula has the effects of benefiting qi and enriching blood, moistening lung and calming, cooling blood and stopping bleeding. As early as the Han Dynasty, auricularia auricula has been used as a blood tonic. Auricularia auricula contains 98 mg of iron per 100 g, which is about 5 times higher than pig liver with the highest iron content in animal food and 30 times higher than spinach with the highest iron content in green leafy vegetables. Auricularia auricula is not only rich in iron, but also extremely rich in nutrition, including protein, vitamins and other nutrients necessary for human body. Eating auricularia auricula often can make platelets agglutinate and reduce the content of cholesterol in blood, which is quite beneficial to coronary heart disease, arteriosclerosis, cardiovascular and cerebrovascular diseases and has certain anti-cancer effect.