1 composting peeling method: it is a traditional peeling method of walnuts in China. The technical point is that the fruits should be transported to the outdoor shade or indoors in time after harvesting, and then piled up in piles according to the thickness of about 50cm (too thick will rot). If a layer of hay or dried leaves with a thickness of about 10cm is added to the fruit pile, the temperature in the pile can be increased, the fruit ripening can be promoted, and the peeling speed can be accelerated. Usually it will be piled for 3 to 5 days. When the green husk is detached from the shell or cracked by more than 50%, it can be peeled with a stick. For those that are not peeled, they can be piled for several days until they are all peeled. When composting, the green husk should not be black or even rotten, so as to avoid sewage infiltrating into the shell to pollute the seeds and reduce the quality and commodity value of nuts.

2. Drug peeling method (not recommended): Because of the long peeling time, low working efficiency and high fruit pollution rate, it has a great influence on the quality of nut products. Since 1970s, some units began to try the technology of ripening and peeling with ethephon. The specific method is: after the fruit is harvested, soak it in 0.3% ~ 0.5% ethephon solution for about half a minute. It can be peeled off in about 2 days. The ripening time and concentration of ethephon are related to fruit maturity. The fruit has high maturity, low drug concentration and short maturity.

Soak it in water for a few days and it will be easy to cut it off.

4. Methods of manually removing walnut green peel: tools, rubber gloves, small hammers, knives, iron brushes, etc. Need to be prepared. Tap the green peel of walnut with a small hammer or peel off a large green peel with a knife, then continue to brush the remaining green peel with an iron brush dipped in water, and finally clean it carefully with a fine needle and toothbrush. It is best to wear rubber gloves all the time, otherwise the skin on your hands will be dyed black. Note: Don't let the juice of green tangerine peel splash on other skin, otherwise it will fester. The green skin of walnut is also called "Qinglong clothes", and its juice is highly toxic. Don't splash it in your eyes. The biggest advantage of artificial peeling is that the skin looks good, and the naturally separated walnut skin is dark.

5 Walnuts are naturally dried in the shade. Choose healthy, disease-free, pest-free walnuts with good skin. After coming down from the tree, put them in a ventilated place and dry them naturally in the shade. In a few days, the walnut skin will be wrinkled, and the green skin will naturally separate from the walnut. But pay attention to the injured walnut, the green skin will turn black locally, so this method is not applicable, because it will cause yin skin.

6 artificial ripening. Spray 200 times of "ethephon" solution evenly on the green tangerine peel, and the green tangerine peel will separate automatically after a whole day.