The concept for conducting hydroformylation reactions by immobilized rhodium complex on solid supports has received considerable attention, as revealed by many recent publications and patents. Among a variety of polymeric supports, including styrene-divinyl benzene copolymers or inorganic compounds functionalized with phosphines or amines, vinyl pyridine copolymer crosslinked with divinylbenzene was used as the primary support in this investigation. Three types of heterogeneous rhodium complex catalysts were prepared and their properties, and activities, selectivities and n/i ratio were studied for hydroformylation of propylene and 1-octene at a temperature of 120-130 degrees C, a pressure of 30-90 Kg/cm(2), and a H2/CO ratio of 1. The results of this study revealed that these novel heterogeneous catalysts were useful for hydroformylation of olefins and have commercial potential.