Tunnel supporting system suitable for soft broken surrounding rock

A tunnel supporting system suitable for soft and broken surrounding rock comprises a primary supporting concrete layer, an anchor rod, a reinforcing mesh, a steel frame and a reinforced supporting concrete layer which are sequentially arranged along the section of the inner wall of an excavated tunnel, and is designed based on an anchor rod drilling position matching module, an anchor rod drilling position generating module and a storage module. The storage module stores historical excavation tunnel data and associated anchor rod drilling position distribution data; the anchor rod drilling position matching module is used for calling historical excavation tunnel data according to the current excavation tunnel data, matching the current excavation tunnel data with the historical excavation tunnel data, and calling associated anchor rod drilling position distribution data if the matching degree is greater than a set threshold value; and the anchor rod drilling position generation module is used for generating a