Changes of industrial structure and employment are of great importance to the sound development of nat ional economy for any region. The paper summarizes the changes in Beijing's industrial structure and employment structure since the reform and opening up and analyses their evolution trend. The paper also analyses the impact of the three changes of industrial structure on employment referring to the theory of elasticity of employment and elaborates on the problems arose in rural labor force migration in Beijing and puts forward advice on policies of optimizing labor force employment structure in Beijing.