Abstract: In this paper，according to features of the wide range and high step-up ratio，a topology of parallel primary and serial secondary is developed for 1.5 kW-level anode power supply of magnetic focusing Hall thruster. In order to improve the efficiency，the condition of phase shifted lag bridge soft switch is analyzed. To restrain the backward recovery voltage spike of the rectifier diode，two clamping diodes in primary and CDD Lossless absorption in secondary are designed. In addition，according to the load feature of Hall thruster，a controller of double-zero and three-pole is designed to improve the dynamics and stability of the power. At last，the rationality of the design is verified by tests. It will provide strong support for future engineering applications.