Aiming at the problems of roof fall, large deformation and difficult support in the surrounding rock of deep composite roof roadway, No. 3201 track crossheading of Wangzhuang Mine was taken as the research object, through the roof drilling peep, the deformation and failure characteristics and support principle of the surrounding rock of deep composite roof roadway were obtained. According to the superiority of prestressed truss anchor cable, the support technology of ' double anchor cable truss of top and side ' was put forward. The numerical simulation showed that the technology could improve the overall bearing capacity of the surrounding rock of the composite roof roadway. The field test results showed that the maximum deformation of the roof, floor and two sides of the roadway was 102.5 mm and 55.1 mm respectively, and the maximum separation of the roof was 20.2 mm after the support technology of ' double anchor cable truss ' was adopted, which effectively controlled the stability of the surrounding rock of the deep composite roof roadway.