The invention relates to a preservation test method for stiff aphidius gifuensis. After preservation at 4 DEG C for 40 d, the eclosion rate of III-age parasitic aphids is 80.36%, and the eclosion ratedecreases with extension of the preservation time, the eclosion rates for 50 d and 60 d are 57.80% and 30.90% respectively, and the eclosion rates of the stiff aphidius gifuensis which are subjectedto stiff treatment for 1 d, 2 d and 3 d and preserved at 4 DEG C for 40 d are 23.70%, 13.40% and 10.00% respectively. The stiff aphidius gifuensis is preserved with a low-temperature preservation method, parameters such as hatchability of the stiff aphidius gifuensis preserved at low temperature are measured, and the best low-temperature preservation method for the stiff aphidius gifuensis is found out. Finally, it is concluded that the preservation age is age III, preservation temperature is 4-6 DEG C, and preservation time is 40 d. According to the preservation test method for the stiff aphidius gifuensis, the shelf life of the stiff aphidius gifuensis can be effectively prolonged, breeding work of the stiff aphidius gifuensis can be reduced, and labor and time are saved. The method hasthe advantages that breeding work of the aphidius gifuensis can be effectively reduced, the eclosion rate of the aphidius gifuensis is high, the method is simple and easy to operate, popularization inproduction is facilitated, and the popularization range is broad.