Driven by green and sustainable methodologies for chemical manufacturing, enzymes are forecast to have much to prospect in the coming years due to their high activity and selectivity. However, the fragile active spatial‐conformation of an enzyme is predominantly maintained by weak intermolecular interactions, showing quite sensitive to thermal, pH, and chemical chemoreception. Thus, the low activity and recyclability result from structural instability can hardly meet the prototype of green chemistry in commercial process. Covalent organic frameworks (COFs) are stable extended porous network materials assembled by organic linkers in a moderate way. Due to their pre‐designable structures, an enzyme possesses the access to be immobilized to the interior or surface of COF skeletons via covalent or noncovalent processes, which can afford protection to enzymes in harsh conditions. Moreover, with the improved stability and cyclicity, the formed COF/enzyme biocomposites can facilitate broader horizon. Herein, this review mainly canvasses the advances in the emerging field of COF/enzyme biocomposites, sketching the factors that are critical in building COF/enzyme systems and the applications of registered enzyme host platforms reported in recent years.
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