Here, we describe the direct exploitation of visible light energy by using a conjugated polymer network (CPN) that is susceptible to an in-situ loading of Pd metal for photocatalytic Suzuki-type C-C cross-coupling reaction. The requisite products were quantitatively achieved (yield of up to >90%), under photo-illumination using environment-friendly solvent. Under normal solar light, the same catalytic activity was maintained using the same conditions. To comprehend the function of every variable and reactive species involved in the reaction’s path, in-depth mechanistic studies were carried out. It is further underlined that CPN has greater catalytic efficiency based on its exceptional resistance to 50 substrates of varying functionality, for 5 consecutive catalyst recycling cycles as well as bulk-scale reactions and a turnover frequency value of up to 1840 h-1 at a low catalyst dose of Pd (0.0125 mol%), while maintaining its catalytic efficacy. Its catalytic competence in terms of scope, scalability, environment friendly, and sustainability supports its proficiency.