This paper introduces the network clock synchronization scheme. For 5 G network

the clock synchronization mismatch between 4 G and 5 G base stations will lead to the decline of 5 G users’ download rate and the failure of 4 G/5 G interoperability. Based on the in-depth analysis of the phenomenon and causes

the paper proposes solutions such as providing 5 G with base station synchronization signal through signal shunting

introducing new satellite receiving antenna and selecting 1588 v2 clock scheme. The plan and prospect of the future promotion of the dual-mode transformation of the mobile base station Beidou/GPS time service system. This paper provides suggestions for the construction of 5 G network clock synchronization.