The invention discloses a floating mold core bending mechanism. The floating mold core bending mechanism comprises a base (1), a floating mold core (2), a left force transferring column (3), a right force transferring column (4) and a connecting plate (5) arranged at the top of the base (1). A fillet (7) is arranged on the left end face of the floating mold core (2). Springs (9) are fixed to the bottoms of cavities (11). Liner tubes (8) penetrate through the connecting plate (5) and communicate with the cavities (11). Threaded rods (10) are arranged inside the liner tubes (8), and the lower ends of the threaded rods (10) are fixed to the tops of the springs (9). The bending mechanism further comprises a female mold insert (12) arranged at the top of the connecting plate (5) and located at the left side of a left floating mechanism, and an arc-shaped groove (13) matched with the fillet (7) is formed in the upper right corner of the female mold insert (12). The arc-shaped groove (13) is formed under the fillet (7). The floating mold core bending mechanism has the beneficial effects that bending precision is high, the bending process is simple, continuous bending is realized, and bending efficiency is improved.