Abstract: In order to study large section starting cut surrounding rock damage and control technology, the paper as the 4th coal seam of a mine in Shanxi engineering background. The use of research, numerical simulation, site construction test and measurement method of combining, research on the deformation and failure of large section starting cut, detailed analysis of the composition anchor truss active control principle, layout and advantages, final proposed composite cable truss control technology and principle, obtained detailed support plan and implement on site. Engineering practice verified the scientific and technical support guiding ideology, and in this hope that similar to other parts of the roadway mine for reference.