To meet the application requirements of electrolytic hydrogen production for low-voltage, high-current, and high-power-density power supplies, a parallel-type virtual 36-pulse rectifier based on an asymmetric current injection circuit(ACIC) was proposed. Firstly, an ACIC module was integrated into the DC side of a traditional 6-pulse rectifier(6-PR), and the AC input current waveform was reshaped by injecting specific compensation currents. Subsequently, pulse-wave expansion of each ACIC unit was achieved using an interphase reactor(IR), enabling equivalent 36-pulse operation at the input side. Finally, the key parameters of the ACIC unit were derived and optimized, its capacity was quantitatively evaluated, and the effectiveness and performance advantages of the designed system were verified through simulation. The results show that this scheme significantly reduces current harmonic content, yielding an approximately sinusoidal input current. The total harmonic distortion(THD) of the grid-side current decreases to 4.68%, and the system efficiency reaches 98.2%. Compared to traditional 36-pulse rectifiers, the grid-side current THD is reduced by 0.32 percentage points, and the system efficiency is improved by 3.2 percentage points. This scheme offers significant advantages in harmonic suppression and energy efficiency enhancement. Moreover, its parallel structural design provides excellent system fault tolerance and high-power scalability, offering an effective solution for electrolytic hydrogen production scenarios.