Study on the dynamic evolution of technology efficiency of mineral resources industry chains in China

Using the panel data from 1991 to 2014 of the five kinds minerals and provinces mineral resources industry chains，based on the measuring of technology efficiency of mineral resources industry chains，used the Kernel density estimation model to analyze the dynamic evolution characteristics of technology efficiency of mineral resources industry chains.The results showed that the technology efficiency Kernel density both provinces and different types mineral resources industry chains presented differentiation distribution of development and evolution characteristics，showing the technology efficiency of mineral resources industry chains trend to different directions；the technology efficiency of the mineral resources industry chains have achieved varying degrees increase for more than 20 years，but the increasing pace slowly；making full use of the following industry technological progress anti-driving mechanism，strengthening the driven conversion by factors to innovation of mineral resources industry chains development，which is a realistic path of the technology efficiency increase rapidly of mineral resources industry chains.