Abstract: Directional drilling technique and equipment, as a kind of the most advanced technique in the field of underground drilling in coal mine in recent years, has played a more and more important role in gas control of coal mine. But after researching, we know that the structural characteristics of this technique and equipment determine that it is more effective in stable formation, and less effective in complex formation. We developed broken seam directional drilling technology, and applied in Jinhui Wanfeng Coal Mine. According to the test results, for Wanfeng Coal Mine with complex geological structure formation, although drilling is difficult and there are more unexpected situations, we can also adopt directional long drilling if proper construction technology is chosen.