Based on the needs of the development of food safety, countries around the world begin to attach great importance to and vigorously develop food machinery that meet the safety and hygiene requirements; at the same time, study and formulate relevant safety and health standards, take safety and hygiene requirements as an important condition for food machinery to be in line with international standards. The purpose is: first, to reduce the occurrence of errors in the working process of food machinery, to reduce human or machine errors in the process of food processing to a low limit of zui; second, to prevent food machinery from working in unhygienic conditions and environment that may cause pollution, so as to avoid the occurrence of unqualified products in food processing; and third, to ensure the reliable operation of food machinery to achieve safe production and clean production. 

In order to achieve the safety and hygiene of food processing from the design and manufacture of food machinery, developed countries attach great importance to the research and application of food machinery safety production technology. The results of the study show that there are two ways to achieve it: one is to formulate perfect technical specifications for food machinery; the other is to strictly organize the design, manufacture and application of food machinery according to these technical specifications. Among these technical specifications, the main ones are the safety and hygiene requirements of food machinery, which covers the design and manufacture of food machinery, equipment selection and matching, equipment installation and verification and so on. 

The application of high and new technology has become an important way to realize the safety of food machinery. At present, the high and new technologies widely used in food machinery mainly include electromechanical optical-hydraulic integration technology, automatic control technology, digital intelligent technology and so on, and have run through every link of food machinery in food processing. 

Compared with the traditional food processing technology, high and new technology has greater economic, social and environmental benefits and other development advantages. The continuous application of various high and new technologies has greatly promoted the industrial development of the food industry in various countries, such as continuous production instead of intermittent production, specialized production instead of general production, large-scale production instead of small and medium-sized production, and whole-process quality control instead of the quality control of zui final products. The continuous production, specialized operation, automatic regulation, whole-process control and industrial management of the food processing process are realized.Facts show that the application of these high and new technologies can not only ensure the nutrition, safety, hygiene, convenience, speed and reduce production costs of processed products, but also improve production efficiency and market competitiveness of products.