Network access method, NB-IoT chip, NB-IoT terminal and computer storage medium

The invention provides a network access method, an NB-IoT chip, an NB-IoT terminal and a computer storage medium, the network access method is applied to the NB-IoT chip, the NB-IoT chip obtains i frequency points through frequency sweeping operation, i is greater than or equal to 1, and the network access method comprises the following steps: according to signal feature data of a service cell under the j-th frequency point in the i frequency points, determining the j-th frequency point in the i frequency points, serving cells searched under the jth frequency point are screened to obtain candidate access cells, j is larger than or equal to 1 and smaller than or equal to i, and the signal characteristic data comprise at least one of RSRP and SINR; the NB-IoT chip demodulates the system message and the RRC message of the candidate access cell under the jth frequency point; and if the NB-IoT chip successfully demodulates the system message and the RRC message of the at least one candidate access cell under the j