An information indication method, which is performed by a first integrated access and backhaul, IAB, base station, characterized in comprising: sending indication information, wherein the indication information is used for indicating whether access of an other IAB base station is allowable, wherein sending the indication information comprises: sending system information and broadcast information, wherein the system information and the broadcast information comprises the indication information, wherein: sending the system information and the broadcast information comprises: sending the system information, wherein the system information comprises a first parameter and a second parameter, the first parameter is used for indicating whether to reserve a cell for operator use, and the second parameter is used for indicating whether to reserve a cell for other use; and sending the broadcast information, wherein the broadcast information comprises master information block, MIB, information, and the MIB information comprises first cell barring information, wherein the first cell barring information and at least one of the first parameter and the second parameter constitute the indication information, or sending the system information and the broadcast information comprises: sending the system information, wherein the system information comprises a first parameter and a second parameter, the first parameter is used for indicating whether to reserve a cell for operator use, and the second parameter is used for indicating whether to reserve a cell for other use; and sending the broadcast information, wherein the broadcast information comprises master information block, MIB, information, the MIB information carries second cell barring information, and the second cell barring information is used for indicating whether the first IAB base station is in an access barred status, wherein the second cell barring information of the MIB information and at least one of the first parameter and the second parameter constitute the indication information. sending indication information, wherein the indication information is used for indicating whether access of an other IAB base station is allowable, wherein sending the indication information comprises: sending system information and broadcast information, wherein the system information and the broadcast information comprises the indication information, wherein: sending the system information and the broadcast information comprises: sending the system information, wherein the system information comprises a first parameter and a second parameter, the first parameter is used for indicating whether to reserve a cell for operator use, and the second parameter is used for indicating whether to reserve a cell for other use; and sending the broadcast information, wherein the broadcast information comprises master information block, MIB, information, and the MIB information comprises first cell barring information, wherein the first cell barring information and at least one of the first parameter and the second parameter constitute the indication information, or sending the system information and the broadcast information comprises: sending the system information, wherein the system information comprises a first parameter and a second parameter, the first parameter is used for indicating whether to reserve a cell for operator use, and the second parameter is used for indicating whether to reserve a cell for other use; and sending the broadcast information, wherein the broadcast information comprises master information block, MIB, information, the MIB information carries second cell barring information, and the second cell barring information is used for indicating whether the first IAB base station is in an access barred status, wherein the second cell barring information of the MIB information and at least one of the first parameter and the second parameter constitute the indication information. sending the system information and the broadcast information comprises: sending the system information, wherein the system information comprises a first parameter and a second parameter, the first parameter is used for indicating whether to reserve a cell for operator use, and the second parameter is used for indicating whether to reserve a cell for other use; and sending the broadcast information, wherein the broadcast information comprises master information block, MIB, information, and the MIB information comprises first cell barring information, wherein the first cell barring information and at least one of the first parameter and the second parameter constitute the indication information, or sending the system information and the broadcast information comprises: sending the system information, wherein the system information comprises a first parameter and a second parameter, the first parameter is used for indicating whether to reserve a cell for operator use, and the second parameter is used for indicating whether to reserve a cell for other use; and sending the broadcast information, wherein the broadcast information comprises master information block, MIB, information, the MIB information carries second cell barring information, and the second cell barring information is used for indicating whether the first IAB base station is in an access barred status, wherein the second cell barring information of the MIB information and at least one of the first parameter and the second parameter constitute the indication information.