An information transmission method performed by a base station, comprising: determining (S101) at least one of a time domain position, a frequency domain position or a spatial domain position for transmitting information, wherein the information comprises a signal and/or a channel; and performing (S102) transmission of the information at the determined at least one of the time domain position, the frequency domain position or the spatial domain position for transmitting the information; wherein the information comprises a synchronization signal/physical broadcast channel block, SS/PBCH block; wherein a method for enabling an SS/PBCH block to satisfy a requirement for an occupied channel bandwidth in an unlicensed spectrum in frequency domain comprises: transmitting the SS/PBCH block in the frequency domain by using a resource element, RE-level resource allocation mode; characterized in that the RE-level resource allocation mode of the SS/PBCH block comprises: assuming that a bandwidth is B1 and corresponds to B2 resource blocks, RBs, and B2 * 12 subcarriers, dividing the B2*12 subcarriers into P1 clusters, wherein each cluster comprises B2 * 12/P1 subcarriers, each of the P1 clusters comprises 240/P1 SS/PBCH block positions, and the SS/PBCH block is mapped at a position having a corresponding number in each of the P1 cluster. determining (S101) at least one of a time domain position, a frequency domain position or a spatial domain position for transmitting information, wherein the information comprises a signal and/or a channel; and performing (S102) transmission of the information at the determined at least one of the time domain position, the frequency domain position or the spatial domain position for transmitting the information; wherein the information comprises a synchronization signal/physical broadcast channel block, SS/PBCH block; wherein a method for enabling an SS/PBCH block to satisfy a requirement for an occupied channel bandwidth in an unlicensed spectrum in frequency domain comprises: transmitting the SS/PBCH block in the frequency domain by using a resource element, RE-level resource allocation mode; characterized in that the RE-level resource allocation mode of the SS/PBCH block comprises: assuming that a bandwidth is B1 and corresponds to B2 resource blocks, RBs, and B2 * 12 subcarriers, dividing the B2*12 subcarriers into P1 clusters, wherein each cluster comprises B2 * 12/P1 subcarriers, each of the P1 clusters comprises 240/P1 SS/PBCH block positions, and the SS/PBCH block is mapped at a position having a corresponding number in each of the P1 cluster. transmitting the SS/PBCH block in the frequency domain by using a resource element, RE-level resource allocation mode; characterized in that the RE-level resource allocation mode of the SS/PBCH block comprises: assuming that a bandwidth is B1 and corresponds to B2 resource blocks, RBs, and B2 * 12 subcarriers, dividing the B2*12 subcarriers into P1 clusters, wherein each cluster comprises B2 * 12/P1 subcarriers, each of the P1 clusters comprises 240/P1 SS/PBCH block positions, and the SS/PBCH block is mapped at a position having a corresponding number in each of the P1 cluster. <EOS>