An inlet has been designed for ramjet assisted range projectile. With the features of ramjet assisted range projectile, such factors as cone parameters, throat parameters, encloser and parameters have been discussed. In particular, an analysis of cone lip parameters and diffuser angle is made. Furthermore, three inlets, single cone with inner contraction, single cone without contraction, and double cone with inner contraction have been designed. With these inlets, numerical simulation and performance also have been conducted. The effect of decisive parameters in inlet design has been analyzed. The result of numerical simulation shows that under the requirement of ramjet assisted range projectile, double cone with inner contraction has better performance.