To enhance the silver iodide (AgI) seeding capability of the catalytic operation aircraft, this paper proposes a method that utilises the high-temperature, high-speed exhaust flame of a turbojet engine for efficient AgI seeding agent combustion and seeding. Based on theoretical and simulation analysis, a systemic architecture integrating storage, delivery, combustion, and control is designed, and a prototype is developed. A specialised seeding agent formulation with 40% AgI content is developed to adapt to the exhaust flame environment. Ground tests are conducted to evaluate the seeding agent’s stable combustion within the exhaust flame, the particle size distribution of the generated aerosols, and their ice-nucleating ability in a cloud chamber. The results show that this technology generates sub-micron-sized (less than 0.5 μm) artificial ice nuclei. Both the ice nucleus concentration and the ice formation efficiency meet operational requirements and are comparable to the performance of conventional AgI flares. This technology significantly improves effective payload and seeding efficiency, offering a new technical approach for UAV (unmanned aerial vehicle)-based weather modification operations.