Abstract: This paper describes the status of the development of Vuilleumier cycle cryogenic refrigerator for spaceborne, It can be used for Infra-red radar, advanced night vision and forward vision in field or airplane, This refigerator has some advantages such as small vibration, long life and high reliability。A optimum design method has been used, various structural parameters have been selected accurately by computer programmings。A special two stroke driving mechanism in the same plane, a favourable heat exchanger and advanced magnetic driver has been designed, The two types single stage 77K VM refrigerators, air cooling and liquid cooling, have been developed。 A number of test have proved that the performance and target of refrigerator have achieved designed requirement, operation is stable and reliable.Subject Term: Spacecraft, Refrigeration technique, Cryogenic equipment, Optimum design.