Abstract: Channel steel beam and T-shaped steel belt are often used to combine beam with the anchor cable in coalmine tunnel. But when the tunnel is in complex conditions, such as high underground pressure, soft surrounding rock and strata pressure distinctly, the combined beam have been yield when the anchor cable did not reach the rated support ability, the support property of anchor cable do not effective utilization. Aiming at these problems, the theoretical analysis and lab test method has been used, and a new kind of combined member of anchor cable, box girder beam has been researched. The field application showed that the box girder beam sharply increased strength and stiffness of the beam, which could effectively collect the surrounding rock surface pressure and transfer to anchor cable, the bearing capacity advanced 8 times rather than 14^#b channel steal; 14 times rather than T-shaped steel belt. It can control the high ground pressure or soft rock roadway deformation effectively.