In enterprise technology innovation main body rating analyzing the LVS framework, based on the establishment of a medium-sized enterprise innovation driving force index, using the statistical data to calculate the medium-sized enterprises in China in 2000 ~ 2014 years of innovation driving force index, reflects the innovation driving force of medium-sized enterprises in the national innovation system in our country have increased substantially.According to the calculation results, discusses the structure, the structure reengineering ability, ability to learn reengineering and value reconstruction ability changes, and the sensitivity coefficient are analyzed.Next to stimulate medium-sized enterprises promote learning reengineering, value recreation, reduce the medium-sized enterprise external costs of innovative activities.