Abstract: Youxian is the largest coal producing county in Hunan province, and Huanglan mining area is the only coal producing area in the county.Huanglan mining area is composed of HuangfengqIao sub-mining area and Lancun sub-mining area, The formation of longtan formation in this area has a large sedimentary thickness and a large change of rocks and a number of coal seams, The coal prospecting in the area is restricted by the difficult problems of coal and rock formation.This study uses a variety of contrast methods to make a comprehensive comparison.A systematic and practical system of coal and rock correlation has been established for the first time，The comparison of coal and rock formations has been solved.The estimated coal resources is 343 million tons.It has realized the biggest coal finding achievements in Hunan and even in the South of China since the founding of the People’s Republic of China.