The ancient book is called walnut peach. Xinjiang is one of the earliest areas where walnuts are planted in China, with a long history of cultivation. The cultivation areas are all over Xinjiang, especially the oases around Tarim Basin. The output ranks in the forefront of the country, and it is sold to the mainland in large quantities and exported to Germany, Britain, Canada, Australia, Hong Kong and Macao. There are many excellent varieties of walnuts in Xinjiang, mainly including paper-skinned walnuts, thin-skinned walnuts, open-kernel walnuts, ear walnuts and early-maturing walnuts, which are generally characterized by thin shells, large fruits and high oil content. Many walnut trees can blossom and bear fruit twice a year, which is rare in other provinces and regions. Walnut is a four-purpose tree species for dried fruit, oil, wood and medicine, which has high economic value. Walnut kernel has high nutritional value, and has medicinal values such as invigorating qi and nourishing blood, moistening dryness and resolving phlegm, benefiting triple energizer and moistening lung. Walnut tree is a very suitable tree species for greening and ornamental in arid areas of Xinjiang.