NB-IoT has the advantages of wide coverage

multiple concurrent access terminals

low transmission rate

low power consumption

low construction cost

etc. It has broad application prospects. However

there are many network structure problems in NB-IoT at this stage. This paper systematically proposes a NBIoT network structure optimization method

which can effectively improve the foundation of network structure

improve user perception

and lay a good foundation for the large-scale application of NB-IoT in the later period.