Abstract: According to sedimentary characteristics of the Carboniferous Taiyuan formation in Feicheng coal field,including lithology,size distribution,sedimentary structure,geochemistry and paleontology etc.,the Carboniferous paleoenvironment of this area is divided into carbonate open platform and tidal flat environment.It is recognized that the Taiyuan formation is formed in the epicontinental coast which is dominated by the tidal.The peat flat is the important paleoenvironment for coal accumulation.The tidal channel destroys the coal bed.The pulsative vibration of the crust is the major factor which controls the evolution of the sedimentary environment and the coal accumulation.