1. Make clear the purpose of food processing and the characteristics of equipment selection and matching. 

1.1 Food processing purposes. According to the requirements of food processing, the original quality characteristics of food should be maintained, the quality characteristics of food should be improved and improved, and the physical, chemical and biological characteristics of food should be changed to meet the different needs of people. improve the utilization value and economic value of agricultural products.Through different characteristics of food processing and intensive processing, in order to develop the multi-function of food and its new products, in order to achieve great value-added benefits of food processing. 

1.2 characteristics of equipment selection. According to the international requirements of food industry safety production, machinery safety and food safety, the selection of working parts and technical parameters of food machinery should adapt to the biological characteristics of processed food and meet the processing requirements of products, and strictly control the loss of raw materials, zui final products and quality decline in the process of food processing. Zui final products are required to be processing machinery and equipment for food or semi-finished products, and the pollution of machinery or other materials to the food processing process should be prevented to ensure that the products meet the food safety requirements. In order to avoid environmental pollution caused by emissions (dregs, grains, pulp, liquid, gas, etc.) during food processing, the food processing environment with polluting emissions should be equipped with pollution treatment equipment to make it meet the discharge standards. For food processing containing a variety of nutrients or medicinal ingredients, consideration should be given to reducing the loss of nutrients or medicinal ingredients, and attention should be paid to the comprehensive development of by-products and scraps to make full use of resources and improve economic benefits. 2. Determine the main basis for choosing a complete set. 

2.1 comply with the relevant industrial policies and standards of the country. 

2.1.1 priority should be given to the selection and adoption of food machinery and equipment that are currently focused on encouraging the development of food machinery and equipment. Focus on the selection and adoption of food machinery and equipment with moderate scale, high scientific and technological content, good economic benefits, low resource consumption, safety and health, less environmental pollution and high resource utilization efficiency. 

2.1.2 it is prohibited to select and use food machinery and equipment that are expressly restricted and eliminated by the current state. Emphasis is placed on the selection and use of food machinery and equipment that violate national laws and regulations, backward mode of production, poor product quality, serious environmental pollution, high consumption of raw materials and energy, and can be replaced by advanced and mature technology, as well as seriously endanger production safety and food safety. 

2.1.3 try to select and adopt food machinery and equipment and stereotyped products with advance standards. First of all, focus on the selection of food machinery and equipment with international standards, foreign advance standards and equivalent international standards, and then select food machinery and equipment with national standards and industry standards, requiring technical conditions such as design, manufacture, installation and inspection of food machinery and equipment, so that zui can be restricted by the existing basic standards, method standards and safety standards. In order to facilitate the performance of food machinery and equipment and the effective play of product quality.