Abstract: The olfactory system plays an important role in the life of insects. Insects identify the chemical signals released by the environment and internal, which rely on the olfactory proteins, and accomplish the life activities such as mating, avoiding predators. In recent years, many olfactory genes have been identified with the development of transcriptome sequencing technology. It has been paid much attention by researchers due to the particularity and importance of sex pheromone binding protein. At present, the rich scientific methods, such as voltage clamp, RNAi, EAG , have made the different elaboration to the olfactory protein function, and made some new discoveries, but there are still some problems to be solved urgently. According to the research progress at home and abroad in recent years，the physical and chemical properties, expression patterns and the relationships with other olfactory proteins were reviewed in this paper.