Abstract: Volatiles emitted from grains are prevalent in granaries during storage, therefore it is pivotal to analyze them and reveal their effects on pests. The volatiles of peanut, paddy rice, rice, wheat, and maize samples with different broken degrees were determined by HS-SPME and GC-MS at 28℃. And the egg number laid on the grains by tobacco moth, Ephestia elutella (Hübner), was checked in the tested device comparatively and separately. The numbers of the eggs were 89, 26, 15, and 3 on broken peanut seeds, whole peanuts, cracked peanut pods, and round peanut pods, respectively, in the same tested device. The egg numbers on broken paddy, rice, whole paddy seeds, broken wheat, whole wheat, broken corns, and whole corn seeds were 74, 26, 10, 11, 3, 0, and 0, respectively in the same tested device. The egg numbers on broken peanut seeds, whole peanut seeds, cracked peanut pods, round peanut pods, broken paddy, rice, whole paddy seeds, broken wheat, whole wheat seeds, broken corns, and whole corn seeds were 83, 38, 21, 11, 10, 6, 0, 2, 0, 0, and 0, respectively, when all peanut and cereals were put together in same determined device. The results showed that the number of laid eggs on broken grain seeds was bigger than that on the whole seeds. The number of insect eggs laid on broken peanut seeds was higher than that on other tested grains. The broken peanut kernels released ethyl cyclopropane, double pentene, 1-nonyl alcohol, 2-tetrahydrofuran alcohol, caproic acid, and pelargonic acid, which were not determined in the tested cereals. This result indicated that these substances may attract tobacco moth to lay eggs.