Abstract  [Aim]  This study aims to determine the control potential of Aphiletes aphidimyza against U. formosanum. [Methods]  The predatory behavior of A. aphidimyza towards U. formosanum was evaluated in a controlled laboratory environment. Additionally, the control potential of A. aphidimyza against U. formosanum in a field setting was simulated using a covered outdoor method. [Results]  The predatory functional response of A. aphidimyza 3rd instar larvae against 1st-5th instar U. formosanum was consistent with the Holling Ⅱ model. The highest instantaneous attack rate (a) and predatory ability (a/T_h) were observed against 1st and 2nd instar U. formosanum were the highest, with values of 0.466 and 12.90, respectively. Search effect decreased with increasing U. formosanum density. As the density of 3rd instar larvae A. aphidimyza increased, there was an increase in the daily average intake of 1st to 5th instar U. formosanum. However, the predation rate gradually decreased with increasing A. aphidimyza density. The intraspecies interference equations were: E_1–2=0.304P^﹣1.148; E₃=0.226P^﹣1.155; E₄=0.177P^﹣1.094; E₅=0.128P^﹣1.028. With regards to predation preference selection, A. aphidimyza 3rd instar larvae had a predation selection rate of 43% and 30% for 1st-2nd instar and 3rd instar U. formosanum, respectively. In the covered outdoor experiment, the ideal control benefit-to-harm ratio of releasing A. aphidimyza pupae for the control of U. formosanum was 1∶10 and 1∶15, with the optimal control effect period occurring on the 6th day following A. aphidimyza release. [Conclusion]  A. aphidimyza has good prevention and control potential against U. formosanum.