一、密云县平原地区基本情况1、自然地理条件密云县地处北京市东北部,东西长69公里,南北宽64公里。东、北分别与河北省兴隆、承德、滦平接壤,西与怀柔区为邻,南与顺义、平谷区相接。地处华北平原与内蒙古高原过渡地带,山地属燕山山脉(南麓),平原属华北平原(北端)。 First, the basic situation of Miyun plain area 1, natural and geographical conditions Miyun County is located in the northeast of Beijing, east-west length of 69 km, 64 km wide north-south. East and North respectively Xinglong, Hebei Province, Chengde, Luanping border, west and adjacent to Huairou District, south and Shunyi, Pinggu District phase. It is located in the transitional zone of North China Plain and Inner Mongolia Plateau. The mountainous area belongs to the Yanshan Mountain Range (south foot), and the plain belongs to the North China Plain (northern end).