The cricket species Velarifictorus ornatus displays distinct wing dimorphism-individuals are either micropterous with much degenerate wings or macropterous with fully developed wings. In previous study, we found that there was a trade-off between flight muscle and reproductive development in female V. ornatus, but not in male, when insects were provided with sufficient food. However, insects may not be able to get enough food in natural condition, and suffer from food stress. Thus, we investigated effect of food stress on flight muscle and reproductive development of V. ornatus in this study to understand whether long-winged (LW) adults preferentially allocate limited resources in flight muscle development, while short-winged (SW) adults allocate them in reproductive development firstly. The results showed that food stress significantly suppressed flight muscle development of SW female, but did not affect flight muscle development of LW female. By contrast, ovarian development of LW female was inhibited dramatically by food stress, but ovarian development of SW female maintained at high level when food supply was reduced. It was suggested that there was a trade-off between flight muscle and reproductive development in female V. ornatus. Like the female, food stress also significantly inhibited flight muscle development in SW male, but not in LW male. Fresh weight of testis did not change significantly in both of LW and SW male when different amount of food was given. However, dry weight of testis was significantly decreased in LW male, while dry weight of testis of SW male did not change significantly when food supply was reduced. This result indicated that trade-off between flight muscle and reproductive development also existed in male V. ornatus.