Based on existing self-advance of large dip angle type hydraulic support complex structure, difficult operation and high failure rate, in order to reduce the coal loss and increase production efficiency, through the adoption of large angle oblique flexible shield support mining method, which reached simple surface production system, balanced production, reliable ventilation and less dust production, safe operating, with high technical content, strong adaptability, safe coefficient, low workers labor intensity, high coal recovery rate, high labor efficiency, obvious economic and social benefits advantages. The technology was one of the most effective method of coal mining in steep seam mining.