Abstract: 【Objective】 This project aims to assecse the biological control potential of Chilomenes quadriplagiata on Tinocallis.kahawaluokalani. 【Methods】 Chilomenes quadriplagiata is an important natural enemy of the crape myrtle aphid Tinocallis kahawaluokalani. The predation and intraspectic disturbance of the adults of C.quadriplagiata to the T.kahawaluokalani were studied in a controlled climatic chamber held at (22±1)℃, (65 ± 10) % RH, and photoperiod of 14∶10 (L∶D) h. 【Results】 The results showed that the functional response of C.quadriplagiata to T.kahawaluokalani fitted well with the Holling-Ⅱ equation.The fitting equation was N_a0.7172N_t/(1+0.0025N_t),and the maximum daily predation number was 286.86.The searching efficiency of C.quadriplagiata to T.kahawaluokalani was gradually decreased with the increase of prey density.The intraspecific interference equation was E=0.4644P^-1.3675. 【Conclusion】 The results indicate that C.quadriplagiata is an effective predator and has a high potential in control T.kahawaluokalani.