Aimed at the problem that the traditional multiple reference consistency check (MRCC) algorithm based on maximum likelihood estimation criterion is failure to effectively distinguish the fault sources of reference station receivers in ground based augmentation system(GBAS), the MRCC algorithm of GBAS ground facility is studied. The theory of GBAS B Value is analyzed, and by a processing flow of MRCC algorithm effectively detected the failed receiver is given, and then a calculation method of B Value threshold based on Gaussian overbounding is proposed. The validation experiments are carried out by using the GBAS prototype. The results show that when there are no faults in the ground facility receivers, the calculated Bvalue of each reference station is within the detection threshold and the consistency check is passed. Once a receiver fails, the trouble can be effectively identified, and when the failed receiver is removed, the B value of the remaining reference stations can be restored to the normal range, and the effectiveness of the proposed algorithm is verified.