Packaging the product into circulation the necessary conditions, to achieve the primary means of packaging is to use packaging machinery. With the development, technological advances in packaging machinery in the packaging field playing an increasing role, the main functions of the following: (1) can be greatly enhanced desktop productivity sliding plastic sealing machine packing machine much faster than the manual packaging, such as candy packaging, hand bag package 10 only a few pieces of sugar 1min, and candy packing machine per minute up to hundreds or even thousand, the number of times to improve efficiency. (2)Rotary Packing Machine can effectively guarantee the quality of packaging machinery packaging packaging materials in accordance with the requirements of the required shape, size and packaging are the same size, and hand-packaging is not guaranteed. This is particularly important export commodities, only the mechanical packaging, packaging can be achieved normalization, standardization, collection of packaging requirements. (3) to achieve the operation can not be achieved by hand packing some packaging operations, such as vacuum packaging, inflatable packaging, skin packaging, filling pressure, etc., are all hand-packing can not be realized, can only be achieved by mechanical packaging. (4)Plastic Bag Production Line can reduce labor intensity, improve the working conditions very labor-intensive manual packing, such as hand packing bulky and weight of the product, both the consumption of physical strength, nor safe; while light small products, due to higher frequencies, monotonous movement, easy to get workers to occupational diseases. Folding machine (5) is conducive to the protection of workers labor for some serious impact on health products, such as severe dust, toxic products, irritant, radioactive products, using hand-packing bound to harm health, and mechanical packaging can be to avoid, and can effectively protect the environment from pollution. (6) can reduce the packaging cost, storage and transportation costs on the loose products, such as cotton, tobacco, silk, hemp, etc., using compression packing machine compression packing, can greatly reduce the volume, thus reducing packaging costs. At the same time greatly reduced as the volume, save storage capacity, reduce storage costs, benefit transport. (7) can reliably ensure product health of certain products, such as food, pharmaceutical packaging, is not allowed under the Health Act packed by hand, as will pollute the product manual and mechanical packaging to avoid direct contact with food, medicines, ensure Health Quality. (8) can promote the development of related industrial packaging machinery is a comprehensive scientific, it relates to materials, technology, equipment, electronics, appliances, automatic control and many other disciplines, and requires the relevant disciplines simultaneously, coordinated development of any discipline The questions will affect the overall performance of packaging machinery. Therefore, the packaging machinery development will effectively promote the progress of relevant disciplines. In addition, to meet the packaging needs of high-speed packaging machinery, its related with before and after the process is bound to adapt, also promoted the simultaneous development of related processes.