The utility model discloses a broadband characteristic verifying device for a direct current transformer, and belongs to the key technology of intelligent equipment. The device provided by the utilitymodel comprises a base, the system comprises a clock synchronization device, a message analysis device and a high-speed acquisition card, and a digital verification system, the digital verification system receives discrete sampling data of the message analysis device and the high-speed acquisition card, and calculates broadband error and steady-state error results of the direct-current transformer according to the discrete sampling data in a digital quantity verification mode; and the digital verification system receives the discrete sampling data output by the high-speed acquisition card, and calculates broadband error and steady-state error results of the direct-current transformer according to the discrete sampling data in an analog quantity verification mode. According to the utilitymodel, the broadband characteristic verification and steady-state error verification functions of the direct-current current transformer capable of realizing analog quantity signal and digital quantity signal output are realized, the broadband error of the direct-current current transformer can be accurately measured, and a technical means is provided for accurate calibration of broadband measurement characteristics of the direct-current current transformer.