Conjugated porous polymer， due to its diversified synthesis methods， high therm-and photo-stability， and tailorable band structure， has demonstrated promising application in visible-light-promoted photocatalysis. Herein， two polymers， i.e. conjugated microporous polymer CMP1 and linear polymer LP2， were prepared by Pd-catalyzed Suzuki-Miyaura cross coupling. The morphology and structure of polymers were characterized by scanning electron microscopy （SEM） and X-ray diffraction （XRD） measurements. Due to its high conjugation degree， CMP1 displays a higher visible light absorption capacity than that of LP2， as the optical property of those two polymers is investigated by the UV-vis diffuse reflectance spectroscopy （DRS）. The conduction band positions of the polymers were analyzed by cyclic voltammetry （CV） test. Both the valence band and conduction band positions of the two polymers met the thermodynamic requirement for photocatalytic NADH regeneration. The photocurrent response and electrochemical impedance were investigated by electrochemical tests. Compared with LP2， CMP1 has a faster photoexcitation response and charge transfer rate. Finally， the photocatalytic NADH regeneration experiments were conducted with CMP1 and LP2 as visible light photocatalysts. As expected， CMP1 demonstrates a higher reaction conversion of 58.3% than that of LP2 （50%）， indicating an excellent photocatalytic efficiency of conjugated polymers.