The utility model provides a comprehensive error detection platform capable of simulating harmonic signals of a pulsation converter station. wherein the upper computer is in communication connection with the DSP controller, and the DSP controller is connected with the three paths of A/D sampling devices and is used for receiving digital signals converted by the three paths of A/D sampling devicesand carrying out digital signal processing according to a control instruction sent by the upper computer; the three paths of A/D sampling devices are connected with three paths of signal conditioningcircuits; the three signal conditioning circuits receive a voltage signal input by the tested voltage input module, a voltage signal converted by the 0.01-level direct current standard current sourcethrough the first I/V conversion module, and a voltage signal converted by the tested current input module through the second I/V conversion module. The 0.01-level direct-current standard current source is connected with the DSP controller and used for outputting simulated pulsation harmonic signal current according to control signals of the DSP controller, harmonic current signals of a pulsationconverter station can be simulated, and the direct-current performance and the pulsation harmonic performance of the direct-current transformer are detected.