The spatial pattern of natural regeneration of Pinus Koraiensis on the burned areas in Lesser Xingan mountain has been analyzed. The Pinus Koraiensis forest communities on burned areas are at very serious level of damage, but the natural regeneration certainly begins with fitting ecological condition as time goes on.The regenerative pattern of Pinus Koraiensis population is aggregation, both Negative Bionmial Distribution and Neyman's Distribution(n→∞) are accepted. The former is fitter than the later, so i...