在林区森林火灾的发生是较为常见的,而且森林火灾有着特定的季节性、地域性和其他诸多的不确定因素。理论上来说森林火灾是指失去人为控制,在林地内自由蔓延和扩展,对森林、生态系统和人类带来一定危害和损失的林火行为。它是一种突发性强、破坏性大、处置相对困难的灾害。所以说对涉及到火因调查的公安机关和有关防火部门应尤为重视。内蒙古大兴安岭林区是我国四大国有林区之一,总面积10.6万km~2,森林覆盖率为75.9%。其森林生态系统维护着呼伦贝尔草 Forest fires are more common in forest areas, and forest fires have certain seasonal, regional and other uncertainties. In theory, forest fire refers to the behavior of forest fire that has lost human control, spreads and expands freely in the woodland, and brings certain harm and loss to forests, ecosystems and human beings. It is a sudden, destructive, disastrous disposition. Therefore, it is important to pay special attention to the public security organs and relevant fire protection departments involved in investigating the fire. The Greater Xing’an Mountains in Inner Mongolia is one of the four state-owned forest areas in China with a total area of ​​106,000 km 2 and a forest coverage rate of 75.9%. Its forest ecosystem maintains Hulunbeier grass