In 2006, Corythucha ciliate was first discovered in China. It was an important invasive pest and had spread from the Yangtze River basin to most of northern China for more than ten years.In this paper, the artificial release method was used to determine the role of visual and olfactory signals in locating the host by the C. ciliate. The results showed that nearly 80% of the adults of C. ciliate tended to coexist visual and olfactory signals compared with single olfactory signals. After the removal of the main olfactory organs of C. ciliate, more than 77% of individuals still tended to visual signals, proving that visual signals play a major role in the process of locating host in the C. ciliate. This result could provide a new theoretical basis for the prevention and control of the C. ciliate.