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In view ofBeiDou Satellite System(BDS)developed by China,DCBproductis not yet mature,this paper presents some technique and methods to calculate BDSsatellite and receiver DCB,then analysis the performance of results under different constraints.Besides,we first take use of the GPS data to validate the precision by using this method.Based on this,using BDS/GPS observation data received by International GNSS Monitoring & Assessment System (iGMAS) and The Multi-GNSS Experiment of IGS (MGEX) tracking stations calculatedthe differential code bias products of BDS satellite and receiver for more than 30 days.Finally,analyzed the stability and accuracy of the products,and assessed the performance of receiver made inChina and foreign by DCB precision.