Abstract: In Lianghuai area of China, due to the influence of the large buried depth of the mine and the complicated roof conditions, when gob-side entry is retained, the roof deformation of the gob-side entry retaining is large, the coal side is easily extruded and the floor heave is serious.In order to solve this problem, taking the 360804 fully mechanized working face of Xinji No.1 Mine as the research object, the technology of gob-side entry retaining supported by flexible formwork wall with roof cutting and pressure relief is proposed.The bilateral cumulative energy blasting technology is used in the advance working face to carry out pre-splitting of the roof of the gob-side entry retaining to reduce the roof stress of the gob-side entry retaining effectively.With the continuous mining of the working face, when the working face coal wall is lagged a certain distance, the flexible formwork wall made of concrete is used to support the roadway side in order to achieve strong support for the roof of the gob-side entry retaining.The field application results show that there are two obvious fractures at different heights of blasting hole, which indicates that the blasting roof cutting effect is good.The maximum separation of the shallow part of the roadway roof is 7 mm, the maximum separation of the deep part is 19 mm, and the roadway roof support is relatively intact.The roadway roof and floor deformation is 430 mm, the two sides deformation is 487 mm, the roadway surrounding rock deformation is within the allowable range, and the roadway retaining effect is good.