The invention discloses a transient characteristic verification system and verification method of a DC transformer. The system comprises: an FT3 high-speed analysis unit for analyzing obtained digitalsignal quantity output by the measured DC transformer, sending the digital signal quantity to an industrial control device, and generating a second pulse synchronization signal; a high-speed collection unit for asynchronously collecting first analog signal quantity output by the measured DC transformer and second analog signal quantity output by a standard DC transformer according to the second pulse synchronization signal; and the industrial control device for respectively determining the transient characteristics when the measured DC transformer outputs analog quantity and digital quantityaccording to the digital signal quantity, the first analog signal quantity and the second analog signal quantity. The transient characteristic verification system disclosed by the invention has relatively high applicability, and can realize the verification of the transient characteristics of analog quantity output type and digital quantity output type DC transformers; and the transient characteristic verification system can be applied to third party measurement and detection agencies and manufacturers of DC transformer calibration equipment to provide help for the performance tests and related researches of the transient characteristics of the DC transformers.