According to the production season, the products include autumn mushrooms, winter mushrooms and spring mushrooms, with winter mushrooms having the best quality. The products are divided into flower mushrooms, thick mushrooms, which are winter mushrooms, and thin mushrooms.

Flower mushroom: The cap has white cracks, is hemispherical, curled, thick flesh, brown cap, light yellow gills, short stalk, dry feet, strong fragrance, no pests and diseases, no charring.

(1) level: cap diameter is more than 6 cm,

(2) level cap diameter is 4-6 cm,

(3) level bacteria The diameter of the cover is 2.5-4 cm, and the breakage does not exceed 10%.

Thick mushroom: The cap is hemispherical, curled, fleshy, brown, with light yellow pleats, short stalk, dry feet, strong fragrance, no pests and diseases, and no blackening.

(1) The diameter of the cap is more than 6 cm,

(2) The diameter of the cap is 4 to 6 cm,

(3) The diameter of the cap Diameter 2.5~4cm, broken no more than 10%.

Thin mushroom: The cap is flat, the flesh is thin, the cap is brown, the pleats are light yellow, the stalk is long, the legs are dry, no pests and diseases, and no blackening.

(1) The diameter of the cap is more than 6 cm,

(2) The diameter of the cap is 4 to 6 cm,

(3) The diameter of the cap Diameter 2.5~4cm, broken no more than 10%.

Ding mushrooms: small shiitake mushrooms with a cap diameter of less than 2.5 cm, normal color, long stem, dry legs, no pests and diseases, no burnt black, no deformed and rotten pieces.

Grading standards for fresh shiitake mushrooms:

Thick mushrooms: round mushroom shape, thick and spherical cap, 4 to 5 cm in diameter, neat and milky gills, and 2-foot stem Within centimeters, no odor, no pests or diseases.

Thin mushrooms:

(1) grade: round mushroom shape, thick cap, all open or slightly curled, diameter of more than 6 cm, flat shape, fungi The pleats are neat and milky white, and the mushroom stem is within 2 cm. There is no peculiar smell and no pests or diseases.

Grade 2: The mushroom shape is round, the cap is fully open and flat, with a diameter of more than 4 cm, the gills are neat and milky white, the mushroom stem is within 2 cm, no odor, and no pests or diseases.

Level 3: The mushroom shape is irregular, the cap is slightly broken, the cap is 4 to 2 cm, there are a small number of deformed mushrooms, and no rotten mushrooms.