Glass curtain walls are widely used in architecture due to their aesthetic appeal and brightness. However, their thermal insulation performance is relatively poor, with natural convection within the cavity contributing significantly to overall heat transfer. To enhance the thermal insulation of double glazing curtain walls and reduce building energy consumption, we propose installing a multi-stage ionic wind generator on the curtain wall to weaken natural convection using ionic wind.In this paper, we introduce an ionic wind generator based on a wire-plate electrode configuration arranged in a plane, demonstrating that it follows the same discharge laws as electrodes arranged in space. An experimental platform was established to investigate the effect of multi-stage ionic wind on reducing natural convection within the cavity. The results indicate that ionic wind interference effectively weakens natural convection, thereby improving the thermal insulation of the glass curtain wall. Specifically, when voltages of 10kV, 15kV, and 20kV are applied, the overall heat transfer coefficient of the double glazing cavity decreases by 5.56%, 10.35%, and 14.39%, respectively. Numerical simulations visually record the process of weakening natural convection and provide electric field data for ionic wind. Additionally, we evaluated the Coefficient of Performance (COP) of the experimental cavity, which reached a maximum of 2.4 in our experiments. Future research can focus on optimizing energy efficiency. This study innovatively explores the feasibility of improving the thermal insulation of glass curtain walls using ionic wind, contributing to reducing building operational energy consumption and mitigating global warming.