Aim\ To study the exterior ballistic parameter matching relationship of the base bleed device and compound rocket assisted shell under the condition satisfied the ratio of assistant range required. Methods\ A model of exterior ballistics is set up. The exterior ballistic matching parameter is calculated. Results\ According to the calculated results

the parameter matching relation meets the demanded ratio of assistant range is achieved. Conclusion\ The parameter matching relation have an important guidance on designing the base bleed device and compound rocket assisted shell.