Abstract: In view of the existing difficult problems of equipment self-weight sliding, coal wall caving, roof instability and others in the 38° large dip angle working face of Changcheng No. 5 Coal Mine, based on the principle of component force of engineering mechanics and rock strata control theory, a technical optimization scheme is proposed. By constructing an anti-slip mechanical model of equipment, a bidirectional hydraulic braking system of double drum electric traction shearer is developed, equipped with 1200 mm brake disc and copper based friction plate, and the braking torque is improved to 1200 kN·m; The scraper conveyor adopts a medium double chain structure combined with trapezoidal anti-slip rib plate at the bottom of the groove. The hydraulic support is innovatively designed with a four column support shield type structure, integrating a three-level folding side protection device. The working face layout adopts pseudo inclined segmentation technology, and the roof control implements the process of "active support+dynamic compensation". The application results show that the operating rate of the shearer is improved to 87.2%, the frequency of coal wall caving is decreased by 73.3%, hydraulic support failure frequency is reduced by 61.2%, the daily coal production yield is remained stable at over 6000 tons, and the coal recovery rate is improved by 3.2%, which achieve a technological breakthrough in safe and efficient mining of large dip angle coal seams.