The invention discloses a remote testing apparatus for an automatic grounding operation of a residual current operated protective device. The testing apparatus is used for automatically detecting operation characteristics of the residual current operated protective device, and comprises a data acquisition module, a data memory, a data processing module, a power supply module, a grounding module and a GSM module, wherein the data acquisition module exchanges data with the residual current operated protective device, the power supply modules provides a working power supply, the data memory is responsible for data storage; the data processing module controls the residual current operated protective device to detect the operation characteristics, the data processing module controls the grounding module to automatically adjust the corresponding grounding resistance, and the data processing module controls the content of a message sent by GSM; and the GSM module sends a message according to processing judgment of the data processing module. The testing apparatus is small in size, and has complete functions of data acquisition, intelligent judgment and remote communication, and the correct rate of detecting the operation characteristics of the residual current operated protective device is improved.