Small-curvature-radius profiling cutter for tunnel shield construction

The utility model discloses a small curvature radius tunnel shield construction profiling cutter, which comprises a profiling cutter main body, two groups of symmetrically arranged baffle rings are fixedly connected on the profiling cutter main body, a track is fixedly connected on the inner wall of one baffle ring in each group of baffle rings, and the track is fixedly connected on the inner wall of the other baffle ring in each group of baffle rings. A notch and a mounting groove matched with the notch are formed in the other baffle ring in a penetrating mode, a plurality of cutter rings matched with the notch are movably connected to the track, and a mounting block matched with the notch and the mounting groove is connected to the outer side of one cutter ring through bolts. The cutter ring is reasonable in structural design, the cutter rings are movably connected with the track and matched with the notches, the outer side of one cutter ring is connected with the installation block matched with the notches