Vacuum frying machine is a product with high synchronous precision and stable operation produced by full-time food machinery (Shanghai) Co., Ltd. Vacuum frying technology rose in the late 1960s and early 1970s. Initially, it was used to fry potato chips, and obtained better quality than the general traditional frying technology. Later, someone used it to dry fruit slices. After 1980s, this technology developed faster and was widely used.