Rotary unlocking mechanism applied to child automobile seat and child automobile seat

The utility model belongs to the technical field of child car seats, and particularly relates to a rotary unlocking mechanism applied to a child car seat and the child car seat. On the basis, the rotary unlocking mechanism applied to the child automobile seat comprises a base plate, a movable plate and a connecting frame, the movable disc is arranged on the chassis and can rotate relative to the chassis; the connecting frame is in sliding connection with the movable disc, and the connecting frame is used for being connected with a seat; a locking structure used for limiting the connecting frame to slide relative to the movable disc is further arranged between the chassis and the connecting frame, and when the movable disc rotates to a certain angle relative to the chassis, the locking structure can be automatically unlocked. According to the moving mode of the automobile seat, the automobile seat is matched with an automatic unlocking structure, so that the automobile seat is naturally unlocked and slides aft