With the rapid development of the self-determination navigation system in many countries,multi-band multi-mode GNSS integrated positioning has become the current research hotspot,which can overcome the limitations that the navigation based on single satellite system would be not continuous and reliable while GNSS signal is sheltered seriously.According to the development status of GNSS navigation positioning system in China in recent years,the paper intended to study on the performance of combined BDS/GPS-RTK with the application of products of iGMAS.