Modern satellite navigation system receiver use adaptive antenna array to suppress the RF interferenceand mitigate multipath signals in different directions from signals of interest.The inter-element amplitude and phase bias errors can cause performance degadation in the receiver.This paper presents a measurement with high precisionin anechoic chamber,where channel multiplexing,differencemeasuring is used to decrease bias error caused by too many measuring data.And calibrating equation is put forwardbased on thethree-dimensional rotating turntable,so that inter-element wave-way difference can be removed.Anlyses show that the measuring precision can be increased by nearly double with low complexity and high efficiency.Then an automatic measuring system is designed,and data is mersured by a multichannel vector network analyzer.A four elements array are measured,comparison between the measuring and simulating results demonstratesthat the phase error is less than 8°while the efficiency is improved by nearly 4 times to conventionalmeasurement.