The utility model relates to the field of tunnel construction, in particular to a large-section fault fracture zone tunnel mud burst processing structure, and solves the problems of large construction space, high construction cost, long period and the like in the conventional fault fracture zone tunnel mud burst processing. The structure comprises a steel arch frame, foot locking anchor tubes, inside small conduits, outside small conduits and water leading and draining tubes, wherein the inside small conduits and the outside small conduits are distributed along the inner contour line and the outer contour line of the steel arch frame; the water leading and draining tubes are distributed at a collapse opening; the angle of the inside small conduits is 10 to 15 degrees; the angle of the outside small conduits is 15 to 25 degrees; a drainage blind tube, a concrete back-injection tube and a mortar pumping tube are pre-embedded at the back of the steel arch frame; the foot locking anchor tubes of the arch frame are reinforced by adopting a novel structure; the structure is simple, reasonable in design, convenient to machine and operate, low in labor intensity, safe, reliable, easy to master, low in cost, suitable for the large-section fault fracture zone mud burst processing of railway tunnels, and easy to popularize and use, has an effect of controlling mud burst and water inrush disasters effectively, and also can be used for the fault fracture zone mud burst processing of highways and hydraulic tunnels.