Abstract: In order to explore the attracting effects of volatiles of wheat with varying broken degrees on Cryptolestes ferrugineus (Stephens), the volatile components were analyzed by headspace solid-phase micro-extraction (SPME) and gas chromatography-mass spectrometry (GC-MS) at 28℃. The results showed that the compounds can be categorized into alkanes, alkenes, aldehydes, alcohols, and furans. The types and components of volatile compounds in wheat with varying broken degrees were different. The number of volatiles in whole wheat, broken wheat, and whole wheat flour were 17, 20, and 20, respectively. And among them, 2, 4-dimethyl-heptane, 3, 3-dimethyl-hexane and trans-2-decenal were not detected in whole wheat.In terms of relative content, the relative content of volatile substances detected in whole wheat changed differently after crushing. The relative content of some substances (such as nonanal, pentanal, hexanol, etc.) increased after the wheat was broken. While, the relative content of limonene and octanal decreased. There were significant differences in the attraction rate and response rate of C. ferrugineus between different broken wheat. The attraction rate and response rate of wheat to insects also increased significantly with the increasing degree of crushing. The attraction rate of females to whole wheat, broken wheat, and whole wheat flour were 33.60%, 40.33%, and 44.77%, respectively; and the response rate were 51.59%, 56.11%, and 58.10%, respectively. The attraction rate of males to whole wheat, broken wheat and whole wheat flour were 32.00%, 37.82%, and 41.04%, respectively; and the response rate were 48.04%, 52.85%, and 54.66%, respectively. Whole wheat flours were more attractive to insects. The behavioral response of C. ferrugineus to different degrees of broken wheat and its main volatiles were measured by electroantennography. The electroantennogram (EAG) response of tested insects to broken wheat was significantly higher than that of whole wheat. When the whole wheat was ground into whole wheat flour, the EAG response of females increased from 0.131 mV to 0.147 mV, and the EAG response of the males increased from 0.091 mV to 0.120 mV. At the same broken degree, the EAG response of females was higher than that of males. Different wheat volatiles could cause different degrees of EAG response in the females and males of C. ferrugineus. With the increase of the volatile concentration, the EAG responses of C. ferrugineus increased. The females and males of C. ferrugineus presented obvious EAG reactions to different concentrations of pentanal, hexanal, trans-2-decenal, nonanal, 1-octen-3-ol, hexanol, octanal, and limonene, which was worthy of further study.