1. mark the source of the goods. That is to say, trademarks have the function of indicating the source of goods and distinguishing different producers and operators, which is the most basic function of trademarks. 2. Express and guarantee the quality of goods. That is to say, a trademark has been used for a long time in a certain kind of goods or services, becoming a symbol of the quality and characteristics of goods, and objectively promoting enterprises to maintain and improve the quality of goods. 3. The role of advertising. That is to say, through its own functions, trademarks transmit information to the market, communicate production and consumption, publicize enterprises and their commodities, and achieve the purpose of developing and occupying the market. The so-called trademarks are silent salesmen, which is the role. 4, the role of property value. That is to say, the use of a trademark by an enterprise indirectly brings property benefits to the enterprise by virtue of the reputation of the trademark; Also refers to the trademark as an integral part of the enterprise property, and directly bring property benefits to the enterprise, the former is called the reputation value of the trademark, while the latter is directly manifested as the enterprise property. 5. Promote the development of market economy. Under the condition of market economy, trademark is not only a symbol to distinguish the source of goods and services, but also a symbol of the reputation and competitiveness of enterprises. It can promote producers and operators to continuously improve the grade of goods, improve the core competitiveness of goods, strive for well-known trademarks, occupy a larger market and obtain higher profits. Trademark competition has become a concentrated expression of all competitions in the modern economic operation of enterprises. Whoever owns well-known trademarks will have a future market.