(1) Commonly eaten mushroom species: Normal mushrooms are round and straight, with thick umbrella, smooth cover and dry quality without breaking; The handle holding the mushroom has a hard feeling, and the mushroom umbrella will expand as before when it is released; The color is yellow and brown, the folds under the mushroom umbrella must be tight and white, and the handle is short and thick; There is fragrance in the distance, no burning, no rain, no mildew, no debris. Flower mushroom: the umbrella surface has white cracks similar to chrysanthemum patterns, and the color is yellow, brown and smooth; Mushroom umbrella thickness; The edge rolls down, the fungus is fine and even, the body is dry, the miscellaneous handle is short (the diameter of the fungus umbrella is 2 ~ 3 cm), and the aroma is rich. Pleurotus ostreatus: the umbrella surface has no pattern, millet color and a little luster; The meat is thick and tender, with slightly larger flowers and more broken edges. Pleurotus ostreatus: flat-topped, light brown, good Pleurotus ostreatus with large slice, thick umbrella, complete umbrella surface edge, few fractures, white or yellowish folds, even folds and short handle. Poisonous mushrooms are sometimes mixed with edible fungi, and it is not difficult to identify them with a little attention. Poisonous mushrooms are brightly colored, the mushroom umbrella is red, purple, yellow or other variegated colors and spots, and the base is red; There is a fungus wheel on the stalk and a cyst on the root; White or yellow milk will flow out after tearing, and it will be spicy. (2) Identification of toxic and non-toxic From the color point of view, toxic mushrooms are brightly colored, often red, green and Huang San, and the center of the mushrooms is suddenly undulating. Mushroom umbrellas often have mottled spots, and there are filamentous or small residues or scales on the surface. Non-toxic mushrooms are generally not bright in color, with flat covers and smooth umbrella surfaces. From the point of secretion, the cap or injured part of poisonous mushroom often secretes viscous liquid, which is reddish brown and spicy, and the cap is easy to change color after tearing. Non-toxic mushrooms are generally dry, and the liquid secreted after crushing is white and has a special fragrance. Generally, the mushroom cover will not change color after tearing. The umbrella handle with poisonous mushrooms is attached to the mushroom wheel, which is easy to break. The lower part of the umbrella handle is provided with a mushroom seat with a spore sac, which is difficult to tear by hand. However, there is no mushroom wheel on the umbrella handle of non-toxic mushrooms, and there is no mushroom holder on the lower part, so it is easy to tear the umbrella handle by hand. Chemical identification, there is a milk method of poisonous mushrooms, which is coated on paper, dried and dropped with a drop of concentrated hydrochloric acid, which turns blue or red immediately after 20 minutes and blue after 30 minutes. In addition, mushrooms are grotesque with slender or thick stems and thick and hard surfaces, like horns, heads and umbrellas. Even if the color is normal, it is mostly poisonous mushrooms.