With the demand for coal increasing, it is necessary to mine the steeply coal seams. The flexible shield supports mining method is a safe and efficient mining method for the steeply coal seams. It was first time employed in Huainan mining district in the 1970s. The flexible shield supports method is optimized on the basis of practices in Daanshan colliery for improving the work efficiency of steeply coal seam. The flexible shield supports method is optimized mainly on the entry layout and winning technology in order to improve the security, yield, and work efficiency by analyzing the distinctive features and adaptability of flexible shield supports method in Daanshan colliery. The mainly optimization contents include the entry layout and the coal breaking technology. One is increasing the angle of working face and changing mining traffic road from 23° to 28°; and the other is transforming from bench blasting technology to piecewise blasting technology. The advantages of the optimized flexible shield supports method are that the slope development length and the post-blasting blockage probability of the working face are reduced, transportation capacity is increased at the working face and slope, and the efficiency is improved.