Abstract:According to regeneration characteristics, Quercus mongolica forests in Heilongjiang Province could be divided into 5 types:pure oak forest,oak birch forest,oak maple forest,oak pine forest and oak pine mixed forest Their successional trend is from pure oak forest to oak birch forest,oak maple forest,oak pine forest and oak pine mixed forest The diversity of oak forests reflects different successional stages Human activity and other disturbances are responsible for different regeneration chara...