In order to solve the problem that the roof fall accident in the large mining height working face with compound roof seriously affects the efficient mining of the mine, through analysis of the local leakage examples of the four working faces in the panel area, which were affected by multiple overlapping stresses, the causes of roof leakage were deeply analyzed from the aspects of geological conditions, site management, support strength, and pressure law, and the paper proposes to delimit special areas, crack roof under water pressure Reinforce anchor cable support+inject polymer materials to maintain roof stability, strengthen rock pressure observation and other roof pre-control technologies, and conduct tests at 12-04 working face. The field test results: the roadway convergence deformation was reduced by more than 50%, the roadway pressure was reduced by 12%-27%, the working face dynamic load coefficient was reduced by 0.14-0.22, the beam end distance was shortened to less than 2 m, and no roof leakage occurs, The practice results showed that the measures taken in advance can effectively control the stability of the top wall and improve the strength of the coal body, which could provide a reference for the roof treatment of the continuous large mining height working face in the same panel.