The utility model relates to a whip line hook hoisting mechanism of a full rotary crane, which is characterized by comprising a support (1). The support (1) is sequentially provided with a reducer (4), a shaft coupling (3) and a motor (2) from the front to the back. The motor (2) is connected with the reducer (4) through the shaft coupling (3), a reel shaft coupling (5) is arranged at the front end of the reducer (4), the reducer (4) is connected with a reel bearing (7) through the reel shaft coupling (5), a reel (6) is sleeved on the reel bearing (7), and a limiting device (8) is arranged at the front end of the reel bearing (7). Due to the limiting device arranged in the front of an assembly of a bearing pedestal, a lifting hook can reduce speed in advance before reaching a limiting position, thereby reducing impact to the whip line hook and prolonging service life of the whip line hook.