Abstract: According to the geological structure characteristics of Zhaozhuang 3# coal seam in the southeast of Qinshui Basin，in order to solve the problems of high-speed horizontal drilling of CBM horizontal well along the near roof of broken and soft coal seam，safe landing of deflecting section，well trajectory control in horizontal section，anti collapse of coal seam shaft wall and solid completion，etc. Through theoretical analysis and practical experience，a complete set of technical system has been formed based on the structural design of the second spud in CBM horizontal well，accurate landing without pilot hole，accurate control of well trajectory，drilling fluid optimization and staged collar cementing. Through the actual drilling verification，many problems of CBM horizontal well drilling along broken soft coal seam are effectively solved，the construction cycle is shortened and the operation risk is reduced. The research results provide technical guidance for the drilling of horizontal wells of coalbed methane near the roof in broken soft coal seam，and have reference significance for the efficient development of coalbed methane in this area.