This paper investigates the current ripple characteristics of the two-phase interleaved three-level Boost converter under different control strategies. Based on simulation analysis under fixed duty cycle conditions, the inductor current and input current ripple performance are compared among four control methods: non-interleaving, 180° interleaving, Z-type interleaving, and N-type interleaving. The study finds that inductor current waveforms overlap under both non-interleaving and 180° interleaving control, resulting in moderate current ripple and balanced current distribution among phases. Although Z-type interleaving control significantly reduces input current ripple, it exhibits a pronounced imbalance in phase currents, leading to current concentration in certain inductors and increased energy loss. In contrast, N-type interleaving control effectively suppresses input current ripple while maintaining excellent current balance among phases, demonstrating superior overall performance. The results indicate that N-type interleaving control is more suitable for applications requiring low input ripple and high stability. This study provides theoretical support and practical guidance for the selection of interleaving control strategies and the design of converters.