A full-automatic car stopper in a cage comprises a left connecting seat, a right connecting seat, two car stopping lugs, a connecting rod mechanism, a transition connecting mechanism and a vertical driving rod, wherein the two car stopping lugs are correspondingly hinged with the two connecting seats; the connecting rod mechanism is used for driving the two car damping lugs to synchronously open or close; the transition connecting mechanism comprises a downward pressing part of which the front end part is in connection fitting with the connecting rod mechanism, a transversely-arranged rack, a gear positioned below the rack, a crank oscillating block mechanism which is arranged between the vertical driving rod and the gear and used for driving the gear to rotate, and a downward pressing mechanism of which the upper end is connected with an oscillating platform; the rear end part of the downward pressing part is hinged with a connecting seat; a returning clamp spring is arranged between the downward pressing part and the connecting seat; a transverse mounting blind hole is formed in the downward pressing part; the rear half part of the rack is arranged in the mounting blind hole; a rack returning spring is arranged between the mounting blind hole and the rack; the front half part of the rack is positioned at the outside of the mounting blind hole and is engaged with the gear; the downward pressing mechanism is arranged above the front end part of the rack. With the adoption of the full-automatic car stopper in the cage, the efficiency and the safety of a mine hoisting system can be improved.