Abstract: Supercritical CO₂ is considered as an important heat transfer medium for the third generation of solar thermal power generation, and it is very important to study the heat transfer performance of supercritical CO₂ and improve its heat transfer performance. In this paper, supercritical CO₂ was used as the heat transfer fluid through numerical simulation to investigate the effect of fin arrangement on the heat transfer process in the discontinuous airfoil fin channel in the printed circuit heat exchanger. Results show that when the staggered distance is 4 mm, its heat transfer performance and resistance performance are both optimal, with the smallest synergy angle between the temperature field and the velocity field and the largest synergy angle between the pressure field and the velocity field. It is shown that this arrangement can make the synergy between the temperature field and the velocity field and the synergy between the pressure field and the velocity field both optimal, and the synergy between them both deteriorates with the increase of the inlet mass flow rate.