Based on actual geological conditions of fully mechanized coal mining face in the west wing of the second plate area, there were nine empty and parallel faces or crossings in mining area and three super high heights were above five meters, which brought great difficulty to mining. In order to achieve maximum recovery of coal resources safely and efficiently, fully mechanized coal mining face in two district West Wing coal pillar was taken as background. Key techniques of ultra high section support method and crossing gob mining technology were studied and analyzed, as well as adopting techniques of shed support and taking the top bottom crossing gob etc. The results showed that the method could meet requirements of extra-high roadway support and mining of fully mechanized coal mining face in the future, which provided a reliable theoretical basis and practical basis for similar conditions.