Fuente: Wipo "IOT" The invention relates to a data transmission method and device based on NB-IOT, communication equipment and a storage medium. The method comprises the following steps: an NB-IOT core network acquiringan NB-IOT data packet transmitted by an NB-IOT terminal through NB-IOT access network device; analyzing the NB-IOT data packet, so that the NB-IOT data packet can be obtained; identifying the serviceidentifier of the NB-IOT data packet; when the same service identifier exists in the recorded service identifier table, processing the corresponding NB-IOT data packet. The NB-IOT data packet does not need to be sent to an external NB-IOT server for processing, the transmission path between the NB-IOT core network and the NB-IOT server is reduced in the data transmission process, so that the influence of the uncontrollability of a network side link on the whole NB-IOT system is avoided. The possibility of data transmission delay and packet loss is reduced, and the reliability of data transmission in the NB-IOT system is improved.