The problem of desforestation is the main problem which can arise from many cause and affect to nature and environment. Woodcutting for do businesses such as make industrial factory, paper mill and build a house or store. It make trees was cut because demand of humans. Public utility building of government such as dam, reservoir, communication route and others. Causing trees was cut or not dead flood. Forest fires, Thailand is often caused forest fires in the summer every year because in summer the weed in the woods or defoliation of trees. The leaves are dry and combustibe.