Aiming at artillery weapons to the long-range precision strike in future wars, the application prospect of ramjet extended-range technology in the projectile was described. From the structure composition and working principle of the ramjet extended-range projectile, its high efficiency was demonstrated, and it was the main development direction of ramjet extended-range technology. At the same time the stufy and development technology of ramjet extended-range projectile in the main developed countries abroad and domestic were introduced. And according to the study situation at home and abroad, the key technical problems to be solved in the process of the ramjet extended-range projectile development were summarized. Finally, combined with artillery weapons development characteristics at present, development orientation to remote, guidance and precision of the ramjet extended-range projectile in the future was proposed.