Abstract: For the problems that 14202 auxiliary roadway of Majialiang Mine influenced by the mining dynamic pressure of adjacent 14201 working face, the underground pressure being very strong, the original roadway support can not meet the requirements of safe production, the control technology of the pressure releasing of roof hydraulic fracturing in advance is proposed according to the characteristics of high dynamic pressure deformation of 14202 auxiliary transport lane, and the fracturing level and the corresponding borehole construction parameters are determined. The fracturing effect of the rock mass is verified by observing whether there is a large amount of fluid flowing out after the hydraulic fracturing. The experimental results show that: after the hydraulic fracturing of the advanced roof is carried out, the maximum displacement of the two sides of the auxiliary transportation lane is about 0.6 m, and the average displacement is about 0.4 m, the maximum floor heave amount is about 1.5 m, the average floor heave amount is about 1 m, which is significantly less than the deformation of dynamic pressure roadway when the hydraulic fracturing technique is not implemented, and effectively solves the large deformation problem of strong dynamic pressure roadway（the maximum floor amount of the roadway without hydraulic fracturing section is 2.5 m, and the average floor heave is 1.9 m）.