Lock catch fixing type unlocking mechanism and safety seat

The embodiment of the utility model discloses a lock catch fixed type unlocking mechanism and a safety seat, the lock catch fixed type unlocking mechanism comprises a shell, a lock catch installed in the shell, a spring bolt matched with the lock catch for use, a driving piece and a control piece, the lock catch comprises a lock catch body and an unlocking key; the shell is provided with a receding hole for the spring bolt to penetrate through. The driving piece is used for pressing the unlocking key; and the control piece is used for unlocking the limiting of the driving piece after receiving an unlocking signal sent by an external processor, so that the driving piece presses the unlocking key. According to the embodiment of the utility model, the unlocking key is ingeniously hidden in the shell, so that a passenger cannot touch the unlocking key, and meanwhile, the control piece can unlock the limiting of the driving piece only after receiving the unlocking signal sent by the external processor, so that the