Large majority is our country enterprise technology innovation is a sharp scale structure characteristics.As a typical representative of the mainstream industry technology, large enterprises to undertake the main task of the industrial technology innovation activities, the introduction of technology digestion, absorption and re-innovation and original innovation, integrated innovation and so on various aspects have bigger comparative advantage.Based on the analysis of large enterprise innovation driving force index, on the basis of calculating the innovation driving force of large enterprises in China from 2000 to 2014 in index (IDF - L), and learn from the ability to structure reengineering, reengineering and value reconstruction ability three aspects to study the innovation driving force situation of large enterprises, study: all indexes of IDF in 2000 ~ 2014 large enterprises - L growth contribution is smaller, there is no negative indicators, and also compare on the distribution of the three partial equilibrium.