The utility model discloses a flying stopping device for a carbon dioxide cracking device. The flying stopping device comprises a base assembly, a supporting rod base, a connecting rod assembly, a sliding assembly, a center rod and a pressing sleeve. The center rod sequentially penetrates through the base assembly and the supporting rod base and then extends into the sliding assembly. The slidingassembly is located in a hollow cavity of the base assembly, the supporting rod base is fixedly connected to the circumferential face of the lower end of the base assembly, the connecting rod assemblyis hinged to the supporting rod base and the sliding assembly, and the pressing sleeve is connected to the upper end of the base assembly in a threaded mode. The pressing sleeve moves downwards to push the sliding assembly to move downwards along the center rod, and therefore the connecting rod assembly is driven to abut against the inner wall of the shot hole. According to the flying stopper, the safety and controllability of the blasting process of the fracturing device are greatly improved.