The article discusses the challenges faced by reactors in hydrogen production systems due to uneven heating caused by solar collectors. It introduces a novel design concept using helical flow channels in the reactor to counteract the uneven temperature distribution. By allowing the reaction gas to enter at the edge and flow inward along the helical channel, the design promotes continuous temperature rise, resulting in impressive methane conversion rates, hydrogen yields, and energy conversion efficiency. The study highlights the effectiveness of this helical structure in utilizing uneven solar heat distribution to enhance reactor efficiency. Unlike previous approaches focusing on improving the heat transfer performance of materials, this innovative design offers a fresh perspective on optimizing reactor efficiency. Through simulation studies under various conditions, the helical flow channels demonstrate their ability to improve the overall performance of the reactor significantly. The findings showcase a methane conversion rate of 94.76%, a hydrogen yield of 1.54 mol/mol, and a total energy conversion efficiency of 32.52%. This paper not only presents a solution to the uneven temperature issue but also proposes a new direction for the design of solar-driven thermochemical reactors, emphasizing the importance of efficient green hydrogen production.