In order to improve the reliability of the time transfer link, Bureau International des Poids et Mesures (BIPM) has officially taken the Galileo time comparison as the backup link for UTC calculation since 2020. Therefore, the delay calibration of the Galileo signal of the receiver is a necessary work for all time-keeping labs around the world to participate in the UTC link. Taking the GPS link calibrated by Physikalisch-Technische Bundesanstalt (PTB) and the National Time Service Center (NTSC) as a reference, this paper sets PT09 receiver as a reference station to calibrate and verify the total Galileo E3 (Galileo E1&E5a) delay of NT02 and NT05 receivers of NTSC. The results show that the total Galileo E3 delays of NT02 and NT05 are 74.6ns and 46.5ns respectively, the calibration uncertainty is 3.5ns, and the calibration delay is relatively stable. After calibration, the results of GPS P3 and Galileo E3 common view comparison between NT02 and NT05 receivers of NTSC and calibrated receivers of other time-keeping labs are basically consistent. Taking the comparison results of GPS P3 links between NTP3 and receivers of other labs as a reference, the average deviation is less than 1.5ns, which is within the calibration uncertainty.