The utility model discloses a detecting platform for digital channels of relay protection equipment. The platform comprises an input interface module, a warning and error code detecting module, a output interface module, a data caching and time delay plugging module and a warning and error code plugging module. The input interface module is used for receiving digital signals to be detected sent by the relay protection equipment; the warning and error code detecting module is used for detecting warnings and error codes of the digital signals to be detected; the data caching and time delay plugging module is used for caching and plugging time delay to the digital signals to be sent; the warning and error code plugging module is used for plugging warnings and error codes to the digital signals to be sent; and after the digital signals to be sent are processed by the data caching and time delay plugging module and the warning and error code plugging module, the output interface module outputs the digital signals to be sent to the relay protection equipment corresponding to a destination address according to the destination address. The utility model has the advantages of complete detection functions and high accuracy.