Based on the measurement of forestry industry agglomeration level of 15 provinces in China in the period 2004-2013, the paper employs the DEA model to measure the provinces' forestry industry eco-efficiency in same period and tests the influence of industrial agglomeration on ecological efficiency through the econometric model. The work shows that the industrial agglomeration level and eco-efficieney of the provinces with higher level of forestry industry in China are increasing in different degrees during the study period. The regression resu...