Disclosed in the present invention are a system information transmission method, a base station, and a terminal, which can improve the flexibility of resource allocation. The method comprises: a base station obtains at least two wireless configuration parameter sets, each of the at least two wireless configuration parameter sets comprising at least one wireless configuration parameter, and values of the at least one wireless configuration parameter in any two wireless configuration parameter sets being different; among at least two wireless configuration parameter sets, the base station determines at least one wireless configuration parameter set for transmitting first system information in a first time period; and the base station sends, according to the at least one wireless configuration parameter set, the first system information in the first time period by means of at least one frequency-domain resource, the at least one frequency-domain resource being in a one-to-one correspondence with the at least one wireless configuration parameter set in the first time period, and frequencies corresponding to any two frequency-domain resources among the at least one frequency-domain resource being different.