1, different classifications. Large enterprises are divided into large enterprises, small and medium-sized enterprises. Small and medium-sized enterprises are divided into medium-sized, small, micro enterprises.

2, different business philosophy. Large enterprises pay more attention to the development and diversification of corporate culture, system, quality and other aspects. Small and medium-sized enterprises are more focused on marketing, branding and reputation.

3, transformation and reform is different. Large enterprises are more difficult to transform and reform. Small and medium-sized enterprise transformation and reform is relatively easy.

4, the number of employees is different. According to international standards, the size of the company is generally divided by the number of employees: generally 500 people below the company is a small company; medium-sized companies for the 500-2000 people; more than 2,000 people for large companies.

5. Microenterprise is a type of small and medium-sized enterprises. It has different standards in different industries. Agriculture, forestry, animal husbandry and fishery industries with business income of less than 500,000 yuan are microenterprises; industries with less than 20 employees or business income of less than 3 million yuan are microenterprises; software and information technology services with less than 10 employees or business income of less than 500,000 yuan are microenterprises; real estate industry with business income of less than 1 million yuan or total assets of less than 20 million yuan are microenterprises.

: enterprise

Enterprises in the category of commodity economy, as one of the many modes of organizational units, in accordance with certain organizational laws, the organic composition of the economic entity, generally for the purpose of profit-making, in order to achieve the investors, customers, employees, the community at large to maximize the interests of the mission, through the provision of products or services in exchange for income. It is a product of social development, due to the development of social division of labor and growth and expansion. Enterprises are the main participants in market economic activities; under the socialist economic system, a variety of enterprises coexist **** with the micro-foundation of the socialist market economy. Enterprises exist in three basic forms of organization: sole proprietorships, partnerships and corporations, and corporate enterprises are the most important and typical form of organization in modern enterprises. Modern economic theory suggests that the enterprise is essentially "a resource allocation mechanism", which can achieve the optimal allocation of economic resources throughout the society, and reduce the "transaction costs" of the whole society.