中小企业在国民经济的发展中具有重要作用 ,放开搞活数量众多的广大中小企业 ,对于整个国民经济的发展和社会的进步意义重大。产业结构调整是放开搞活中小企业的重要途径和调整对策的依据 Small and medium-sized enterprises play an important role in the development of the national economy. Letting go and invigorate a large number of small and medium-sized enterprises of large numbers is of great significance to the development of the entire national economy and the progress of society. Adjustment of industrial structure is the basis for opening up an important way to revitalize small and medium-sized enterprises and to adjust countermeasures