Mutual inductor checking system

The utility model provides a mutual inductor checking system, comprising a main machine part and an auxiliary machine part, which are connected via a wireless network. The auxiliary machine part acquires secondary-end electric signals of a standard mutual inductor and a checked mutual inductor according to a check signal emitted by the main machine part, and transmits the secondary-end electric signals to the main machine part. The main machine part compares the electric signals of the standard mutual inductor and the checked mutual inductor, calculates a check difference value of the check mutual inductor with respect to the standard mutual inductor, and displays checking results according to the check difference value. According to the utility model, remote measurement of errors of multiple mutual inductors can be conducted simultaneously, increasing the checking efficiency and enhancing the security in mutual inductor error measurement.