Large　area　exposure　of　bare　soils　caused　by　soil　erosion　has　serious　impacts　on　the　regional　ecological　environment,　such　as　the　rise　of　land　surface　temperature　(LST).　As　a　typical　reddish　soil　erosion　region　in　southern　China,　the　hilly　area　in　County　Changting　has　been　called　flame　hilly　area　because　of　extensively　exposed　reddish　soils　and　hot　weather　in　the　area.　This　study　utilizes　remote　sensing　technology　to　investigate　dynamic　of　soil　exposure　intensity　(SEI)　and　accompanied　soil　heat　flux　and　LST　changes　during　the　period　from　1988　to　2010　in　the　county.　Results　show　that　owing　to　the　22-year　treatment　of　soil　erosion,　the　SEI　in　the　main　soil　loss　areas　of　the　county　has　declined　by　20.26%,　high　SEI　area　has　reduced　by　81.95%,　and　soil　heat　flux　has　decreased　by　33.28%.　All　of　these　have　contributed　to　the　decrease　in　LST　differences　between　exposed　and　vegetated　areas　by　20.8%　during　the　study　period.　This　indicates　an　improvement　of　the　thermal　environment　in　the　flame　hill　area　once　severely　exposed.　Detailed　quantitative　relationship　analysis　can　find　that　(1)　SEI　is　positively　linearly　correlated　with　soil　heat　flux　and　LST　and　(2)　each　decrease　in　SEI　by　0.1　unit　in　the　future　would　reduce　LST　difference　by　0.88°C　(or　1.01°C　when　accompanied　by　an　equal　increment　in　fractional　vegetation　cover).　©　2013　Royal　Meteorological　Society.