【Background】Corythucha ciliata (Say) is a newlyidentified invasive alien species mainly destroying Platanus spp. Selenothrips rubrocinctus (Giard) is another recent pest that targets these same widespread host plants. Observations of sap sucking events suggest that competition exists between S.rubrocinctus and C.ciliata. This study examined the competitive interactions of C.ciliate and S.rubrocinctus. 【Method】In this project, we recorded every 10 days the number of C.ciliata and S.rubrocinctus individuals found on 15 marked branches Platanus spp. For the data, niche width and degree of overlap between species were calculated. 【Result】The population of C.ciliata was signficantly higher than that of S.rubrocinctus. The results showed that in general the niche width of C.ciliata was larger than the one of S.rubrocinctus. While the overlap between the temporal niches appeared small, the interspecific competition coefficient between the two species was 0.7022, suggesting high level of temporal competition between the two species. Spatial competition increased mainly in midJune to lateJuly, compared to, significantly higher than the intensity of competition on the branches and leaves of Platanus spp.; The time differentiation of propagate niche with C.ciliate and S.rubrocinctus on the Platanus spp., only the autumn generation of S.rubrocinctus laid eggs on leaves of Platanus spp., but all generation of C.ciliata were laid eggs on leaves of Platanus spp., and common during the breeding on Platanus spp. by C.ciliate and S.rubrocinctus, the branches and leaves choiced by S.rubrocinctus for spawning were the same to C.ciliata, showed that two species of spawning branches and leaves with similar space requirement. 【Conclusion and significance】This study suggests that the invasion of C.ciliata may not have any negative effect on the survival and population dynamics of S.rubrocinctus.