Abstract: In a lot of single-shot applications and experiments at remote locations where magnetic flux compression generator(MFCG) provides the most practicable power, it is impracticable or inconvenient to use a capacitor bank to be the initial energy source. Godovnina, V.V. et al have used a homogenous permanent magnet as the initial energy source to drive MFCG, but the energy density stored in a single permanent magnet is very low. The possibility of using periodic permanent magnetic ring structure to be the initial energy source of an MFCG was analyzed theoretically and numerically. It was concluded that about 1 kJ initial energy can be provided to an MFCG by the periodic-ring permanent magnetic ring which weights less than 30 kg and the outside radius less than 30 cm. In this paper, an axially