The fruit and vegetable crisp chips vacuum puff processing line has realized the leap from fried to non-fried in the processing of fruit and vegetable chips. The fruit and vegetable pressure difference puffing drying technology adopted is a new type, environmental protection, energy-saving and non-fried puffing drying technology, the basic principle is to raise the temperature and pressurize of the pretreated fruit or vegetable raw materials in the expansion tank, after a period of time, the pressure is released instantly, the moisture inside the material is instantly vaporized, evaporated and expanded, and then dehydrated and dried in a vacuum state, thereby achieving the effect of volume expansion and crisp taste .