Researches on classification of the sites of mongolian scots pine (Pinus sylvestris var. mongolica.) plantation in Liaoning province have been carried out by combining ccology with statistic analysis. The results show that the heat and moisture content is the most important conditions for growth and the soil is the precondition for high and stable yield of mongolian scots pine. Six types of sites are divided by comprehensive analyses on the factors such as climate, soil, elevation and the growth state of mo...