Abstract: In order to ensure that electronic equipment can have a long enough working life and can operate safely under high heat flow, the problem of heat dissipation and cooling of high temperature equipment must be solved reliably and economically. In order to solve the problem of limited heat transfer capability of plate-fin structures in a narrow space, a heat dissipation method combining dual synthetic jets and surface micro-convex composite fins was proposed based on the theory of longitudinal vortex enhanced heat transfer. Using the Fluent software, the internal gas flow characteristics of the composite fin and its enhanced heat transfer characteristics under the action of dual synthetic jets were studied. The simulation results show that the vortex in the Y direction near the surface micro-convex composite fins is more than twice that of the traditional smooth fins, and the heat transfer performance is increased by 10%. When the driving frequency of the dual synthetic jet is 500 Hz, it has a uniform temperature distribution and better heat dissipation effect. The heat dissipation efficiency is better at the peak speed of dual synthetic jets.