Broad bean (Vicia faba L.) often exhibits an average outcrossing rate of about 30%. This phenomenon greatly led to the decline of uniformity and stability of broad bean cultivars. Due to the consequences caused by the climate and pollination factors, breeding for lower outcrossing rate using normal germplasm was un-able to be well maintained. However, identification of cultivars with special flower structures, which could reduce honey forage behaviour of insect medium, is considered to be a better strategy. In this study, a natural mutation of broad bean showing short wing petal was obtained from Yunnan province and named 81-37. This character exhibited potential to impede the insects on gathering nectar, thus resulting in reduction on insect-induced outcrossing. The outcrossing rate of short wing petal type decreased from 30 % to 5% compared to the common types of broad bean. By using this mutant for crossing and back-crossing with common types of broad bean, the offsprings with the characters of short wing petal were selected for further cultivar breeding and production. This helped to keep the stability of stress resistance, adaption, growing period, flower color, seed coat and hilum color, cotyledon color, plant height, pod shape, seed nutrition, and maintained the high yield and better quality of broad bean cultivars, which prolonged the durable years of cultivars, benefited the industrial development of broad bean. Thus, this work provided a special germplasm being valuable in breeding for broad bean varieties.