Finned heat sinks are reliable and are used in a large number of applications to aid in the dissipation of heat from electronic heat-generating devices. Designing heat sinks with high heat dissipation efficiency under limited installation conditions and working environments is the challenge of the day. The positional parameters such as different depths of fins inserted into the heat sink base, number of fins, different angles of inclination of fins, different widths and rows between fins, and different staggered heights of fins are analyzed for heat dissipation based on the finite element analysis method. It was found that the higher the number of fins, the better the heat dissipation effect under the same conditions. The deeper the fins are inserted into the radiator base, the better the heat dissipation. Changes in the angle of the radiator fins do not have a significant effect on heat dissipation. Heat dissipation cannot be improved by reducing fin width and increasing fin spacing. The staggered fin height does not have a significant effect on heat dissipation. The results of the study show that increasing the number of fins and the depth of fins inserted into the radiator base improves heat dissipation when designing the fin locations of finned radiators.