The encapsulation of organic conjugated polymers in ordered mesoporous silica has the advantages of improving the mechanical, thermal, and chemical stabilities and its application in optoelectronic devices is promising. This review illustrates the synthesis of organic conjugated polymer/mesoporous silica composites in the last decade. The preparation of such composites is categorized into three types: (1) encapsulation of synthesized polymer by infiltration; (2) polymerization in ordered mesoporous silica to form conjugate polymer; (3) polymerization of unidirectionaly aligned surfactants in ordered mesoporous silica. The optoelectronic properties, thermal stabilities, and fabrication of these composites are also discussed.