Abstract: It is great significance to identify the general rules of land use change in typical topography unit of karst valley area and the differences and couple effect of the land use change between hillside and trough dam driven by various influenced factors. This study based on the high-resolution images from 2005 year、2010 year、 2014 year and 2017 year were used as the data source and combined with field survey to verify the image, by calculating the land use dynamic degree index reveals that the spatial distribution of land use change similarity characteristics and differences、land use amplitude、land use dynamic degree in karst hillside-trough dam area. The conclusion shows that: (1)Over time, the hillside and trough dam land use amplitude and land use dynamic degree are 2014-2017 years>2010-2014 years>2005-2010 years and the western > the eastern > the middle trough valley and also land use dynamic degree in the trough dam is faster and more stable than the hillside.(2)The similarity characteristics of land use spatial distribution in the karst trough valley area is that the urban land, the residential land and the paddy field are mainly distributed in the trough dam, and shrubland, woodland, grassland, dry land are mainly distributed on the hillside.The western、the middle、the eastern trough valley in karst area are showing individual differences and land use is limited due to the difference of the hillside-trough dam natural environment and the influence of social economy.