A new charge concept for increasing intelligent ammunition muzzle velocity based on differential traveling charge technology which is able to largely increase gun working volume utilization rate and muzzle velocity within the limits of given projectile overload was proposed. With adaption of sub-caliber sabot projectile design technology, this charge technique facilitates the design of high lift-drag ratio gliding projectile, and increases artillery range. A differential traveling principle interior ballistic numeric model was established. Assuming traveling charge mass 9.2 kg and main principal charge mass 13.41 kg, the calculation of 160 mm gun with the new charge technique demonstrates that the projectile muzzle velocity increases by 26% and gun working volume utilization rate increases by 28%, and under the conditions of maximum bore pressure up to 350 MPa, projectile bottom maximum pressure p_2m≤318 MPa, projectile mass 43.4 kg and travel 7.64 m. Through calculation with modified particle external trajectory model for 130mm sub-caliber gliding projectile, this charge technique can extend maximum range to 99 km.