Particle distribution, morphology, mineral and chemical compositions of atmospheric particles were studied by optic and electronic microscopy, X-ray diffraction and synchrotron radiation X-ray fluorescence. Statistical results demonstrate that the coarse particles of atmospheric particles in Zhongguancun area decrease with the elevation of the relative height. There are three morphologi- cal types, namely, grained and columnar individual minerals, spherical flying beads and irregular aggregates. Other analytical results show that atmospheric particles come mainly from natural dust, concrete industry, coal-fire, and automobile exhaust pollution.