Based on coal under building, large capacity of ground waste rock and fly ash drainage, in order to improve filling rate and yield of comprehensive ability, new filling support upgrade and optimization to improve the safe and efficient process was conducted in 7614 working face of Xingtai Mine, comprehensive online digital mine pressure monitoring system was set up. The practice showed that the technology ensured the efficient production and realized mining with filling in parallel, continuous mining, reduced the deformation of ground buildings, recycled the coal under building to the maximum and formed relatively mature filling mining technology. 7614 working face recycled 316 000 t coal, with direct economic benefit 262 million RMB, profit  85.3 million RMB.