The invention discloses a generator power angle measurement method based on RFID, comprising steps of setting an RFID passive electronic label on an inter-phase pulse collection module, performing only addressing on the electrode of the generator, performing learning on the RFID address information when the generator performs initial phase angle verification, collecting the RFID address information of various electrodes which corresponds to various key phase pulses during the set grid connection after the verification of the initial phase angle, calculating the corresponding the generator power angle, comparing the collected RFID address information with the self-learning result to find the effective generator power angle data and obtaining the final generator power angle result through the average calculation. The invention solves the inaccuracy of the generator power angle measurement because of the loss of the inter-phase pulse and improves the accuracy and reliability of the generator power angle measurement.