The utility model relates to the field of engineering machinery, and discloses a flipping tackle capable of automatically locking. The flipping tackle comprises a hook, a hanging ring, a fixed pulley, a lock tongue and a linkage device, wherein the hanging ring and the fixed pulley are arranged on the two sides of the hook respectively; the hook comprises an opening; the lock tongue is arranged in the opening of the hook; and the linkage device is arranged on the hook, connected with the lock tongue and used for controlling the lock tongue to open or close the opening after being stressed. Due to the fact that the linkage device is arranged and can control the lock tongue to open or close the opening after being stressed, the flipping tackle provided by the embodiment has the self-locking function, and the safety coefficients of the flipping tackle when the flipping tackle is used are improved.