A method for determining a sending time of a synchronization block includes: performing descrambling and decoding on a PBCH message carried in the synchronous block, and buffering PBCH symbol data of the PBCH message before demodulation; after the descrambling succeeds and the decoding fails, acquiring PBCH symbol data to be merged, which are same as buffered PBCH symbol data. The PBCH symbol data to be merged include PBCH symbol data of a beam where the synchronous block is located and PBCH symbol data of an adjacent beam in a PBCH merge period; and merging the buffered PBCH symbol data and the PBCH symbol data to be merged until the PBCH symbol data can be correctly decoded. The sending time of the synchronous block and the system frame number can be effectively indicated in the 5G system, and merging PBCH symbol data can be realized without increasing UE complexity.