The moth Trabala vishnou gigantina Yang is a leaf-eating pest, and there have been severe outbreaks of it in Hippophae rhamnoides plantations in North China. To study the effects of short-term high temperatures on its feeding, mating, longevity, and fecundity, T. vishnou gigantina were cultivated at 30, 35, and 40°C for 1, 2, and 4 h. The results showed that the different intensities and durations of the high temperatures had significant impacts on the moth’s survival and reproduction. With increased temperatures and durations of exposure, the development time of T. vishnou gigantina was shortened and then prolonged. At 30 and 35°C, with increased exposure time, the development time was shorter than that at 25°C, whereas it was significantly longer at 40°C. The increase in temperatures and treatment times resulted in gradual decrease in mating rate. With increased temperature, the average fecundity, fecundity rate, and average adult longevity (of both the males and females), gradually decreased. Furthermore, with increased treatment times, at the same temperatures, the average fecundity, fecundity rate, and average adult longevity (of both the males and females), also gradually decreased.In conclusion, T. vishnou gigantina is significantly impacted on survival and reproduction by short term high temperatures. This study is expected to provide a scientific basis for predicting the population dynamics in T. vishnou gigantina.