Porous organic polymers (POPs)-based catalysts have emerged as promising materials for the conversion of low-concentration CO2 into valuable chemicals, leveraging their high specific surface area, designability, multifunctionality, exceptional stability, and eco-friendliness. This comprehensive review synthesizes the latest advancements in POPs-based catalysts application for in-situ conversion of low-concentration CO2 into value-added chemicals, dissecting the design concepts, preparation methods, structural characteristics, and performance parameters of the catalysts. The synthesis strategies include homopolymerization, copolymerization, Friedel-Crafts alkylation, Schiff base condensation, phenol-formaldehyde condensation, and cyano trimerization condensation reactions. This paper also provides a forward-looking perspective on the potential future developments within this domain. The goal is to lay a robust scientific groundwork for driving technological innovation and to illuminate the path for future research in this burgeoning field.