The construction of high-speed railway network can produce the effect of "time-space compression".In order to explore the impact of high-speed rail network construction on accessibility of cities and spatial pattern of cities and towns in Shanxi province,the average travel time,economy potential and daily accessibility methods are selected based on accessibility perspective using ArcGIS10.3 platform to comprehensively measure the impact of high-speed rail network on accessibility,economy potential and urban spatial pattern of cities in Shanxi province.The results show:1) The construction of high-speed railway network greatly enhances the accessibility of cities along railway route,which is conducive to the enhancement of economy agglomeration effect of Taiyuan city,the "large"-shaped high-speed rail transit axis including north-south axis,east-west axis,northeast-southwest axis and northwest-southeast axis is formed.2) High-speed rail network has improved the economy potential of the cities along railway line.The location advantage of Taiyuan and its neighboring cities located in the center of railway network is significant.The location of cities located in inter-provincial border area to contact with exterior provinces is superior,and they will become strategic fulcrum of inter-provincial exchanges in Shanxi province.3) After the completion of high-speed railway network construcion, the 0.5h core circle,1h tight circle and 2h exchange circle in the province centered on Taiyuan are basically formed. The inter-provincial 3h exchange and cooperation circle centered on Taiyuan is being formed, and the urban spatial pattern of "one core,one circle,three groups" in Shanxi province is being increasingly formed.The construction of high-speed rail network will provide the basic support conditions for the evolution of economy spatial pattern and the construction of urban system framework in Shanxi province.