Abstract
The very serious problems facing Beijing are the so called "Mega-deseases". For the resolution, the major topics of this paper are the following qquestions concrened about the development of economy,gowth of populaion, deteriation of environment and urban constuction happened within Beijing and to the areas around Beijing.And the main causes for these mega-deseases are also delt with in the paper.The time range of the discussion is divided into the two periods from 1949-1978 and 1978-2014.