The cause of secondary pulsating voltage generating and its impact on the current of the net-side were analyzed, a double closed-loop harmonic suppression algorithm combining notch filter and plug-in odd harmonic repetitive control was presented. Design principle of current controller based on plug-in odd harmonic repetitive control was introduced in details, which achieved steady-state error-free current loop control to suppress odd harmonics of the net-side current by increasing the gain of the fundamental and odd harmonic frequency, and used the notch filter to suppress the effect of pulsating voltage in the voltage loop. Finally, simulation with Matlab showed the effectiveness of the program.