Based on the coexistence and asymmetric migration of coal bed methane（CBM）and coal roof tight sandstone （CRTS）gas of the southern area of Zhengzhuang-Fanzhuang block in Qinshui Basin，the concept of micro-transportation system was proposed for the process of symbiotic gas accumulation. The micro-transportation system was studied by using methods of the high pressure mercury injection，low-temperature liquid nitrogen adsorption and nuclear magnetic resonance（NMR）. After studying on the static characteristics and dynamic mechanism of micro-transportation system，it is found that the static micro-transportation system of the coal seam in the study area is mainly consist of transitional pores-micropores and high density and high angle fractures. The decreasing of pressure caused by tectonic uplift is the driving force for the coal seam gas micro-transportation. From the late Paleogene to now，changes in pressure caused by tectonic uplift result in the desorption of gas once adsorbed on coal and 14.29 m3 methane gas desorbed from one ton coal. Late in Paleogene （30 Ma），methane diffused according to Fick’s law within the scope of the coal rock aperture. Today methane diffuses transitionally in coal rock with the aperture of 5-15 nm，and diffuses according to Fick’s law in coal rock with the aperture of 15-100 nm.