The utility model discloses a clamping anti-falling tool apron for a jacking pipe, a shield and a TBM cutterhead. The device comprises a cutter box, a cutter shaft tensioning block, a tensioning boltand a cutter shaft wedge block, wherein every two cutter shaft wedge blocks form a group; wherein the cutter shaft wedge blocks are arranged up and down, the wedge surfaces are overlapped to form a cuboid, a group of cutter shaft wedge blocks are arranged laterally above each cutter shaft tensioning block, the large end and the small end of each cutter shaft wedge block are provided with dovetailgroove spigots, the dovetail groove spigot at the upper part is clamped with the cutter box after the wedge surfaces are overlapped, and the dovetail groove spigot at the lower part is clamped with the cutter shaft tensioning block. The cutter holder mounting structure has the beneficial effects that (1) the absolute fixity of the cutter holder mounting structure is not influenced even if the hobbing cutter and the replaceable tearing cutter have errors during machining due to the arrangement of the double wedge blocks; and (2) in the continuous tensioning process of the cutter shaft tensioning block, the double wedge blocks continuously and relatively move, so that the hobbing cutter can be effectively clamped, and the tearing cutter can be replaced.