A time check method, comprising: receiving, by a base station, an authentication interaction message sent by an authentication interaction device, the authentication interaction message being received prior to setting up an internet key exchange, IKE, security association, SA, between the base station and a security gateway and comprising time information; extracting, by the base station,; and align, by the base station, the local time to the time information before the IKE connection is set up between the base station and the security gateway successfully; wherein the authentication interaction device is the security gateway, the authentication interaction message is a first-stage interaction response, and the time information is current time of the security gateway, the receiving step comprises: receiving, by a base station, the first-stage interaction response sent by the security gateway, wherein the first-stage interaction response carries the current time of the security gateway; the extracting step comprises: extracting, by the base station, the current time of the security gateway in the first-stage interaction response; and the aligning step comprises: using, by the base station, the current time of the security gateway to check the local time and to align the local time to the current time of the security gateway. receiving, by a base station, an authentication interaction message sent by an authentication interaction device, the authentication interaction message being received prior to setting up an internet key exchange, IKE, security association, SA, between the base station and a security gateway and comprising time information; extracting, by the base station,; and align, by the base station, the local time to the time information before the IKE connection is set up between the base station and the security gateway successfully; wherein the authentication interaction device is the security gateway, the authentication interaction message is a first-stage interaction response, and the time information is current time of the security gateway, the receiving step comprises: receiving, by a base station, the first-stage interaction response sent by the security gateway, wherein the first-stage interaction response carries the current time of the security gateway; the extracting step comprises: extracting, by the base station, the current time of the security gateway in the first-stage interaction response; and the aligning step comprises: using, by the base station, the current time of the security gateway to check the local time and to align the local time to the current time of the security gateway. receiving, by a base station, the first-stage interaction response sent by the security gateway, wherein the first-stage interaction response carries the current time of the security gateway; the extracting step comprises: extracting, by the base station, the current time of the security gateway in the first-stage interaction response; and the aligning step comprises: using, by the base station, the current time of the security gateway to check the local time and to align the local time to the current time of the security gateway. extracting, by the base station, the current time of the security gateway in the first-stage interaction response; and the aligning step comprises: using, by the base station, the current time of the security gateway to check the local time and to align the local time to the current time of the security gateway. using, by the base station, the current time of the security gateway to check the local time and to align the local time to the current time of the security gateway.