In summary, our findings show that MCR-COFs are promising photocatalysts for stable long-term photocatalytic H2 production. We synthesized six distinct pore-functionalized quinoline-based donor-acceptor COFs through the Povarov reaction. These PCOFs exhibited exceptional chemical stability and photostability, sustaining steady H2 evolution for a remarkable duration of 8-15 days. The observed dynamic enhancement in photocatalytic HER correlates with the higher order, crystallinity, substantial surface area, and improved wettability inherent in COF structures.