[Aim] To investigate the predation potential of Sycanus croceovittatus (Hemiptera: Reduviidae) adults on Spodoptera litura (Lepidoptera: Noctuidae) larvae. [Method] The predatory functional response, searching effect, and interference response of Sycanus croceovittatus to Spodoptera litura 2nd, 3rd, and 4th instar larvae were studied in the laboratory. [Result] The predatory functional response models of Sycanus croceovittatus adults to the 2nd, 3rd, and 4th instar larvae of Spodoptera litura were all in accordance with Holling type II functional response. That is, the predation amount increases with an increase in prey density, and the search effect decreases with an increase in prey density. The Holling type Ⅱ functional response equation is as follows: N_a=0.9750N/(1+0.0273N), N_a=1.1654N/(1+0.0804N), and N_a=1.3058N/(1+0.1799N). The self-density interference response of Sycanus croceovittatus adults was in accordance with the HasseⅡ type (E=0.337P^-0.565): with an increase in prey density, the average predation quantity and predation rate decrease gradually. [Conclusion] Sycanus croceovittatus adults have good control potential for Spodoptera litura larvae and can be used in biological control of Spodoptera litura.