The invention provides an implementation method supporting the capability of actively pushing data messages. The method is applied to a system based on an identifier-locator split architecture. The method comprises the following steps: a first host node transmits a data message needing to be pushed to a second host node to a mapping forwarding plane, wherein the data message carries the identifier of the second host node; and the mapping forwarding plane executes the following forwarding steps after receiving the data message: when the second host node is online, the data message is forwardedto the second host node; and when the second host node is offline, the data message is stored, and after the second host node is learned to be online, the data message is forwarded to the second hostnode. The invention also provides an implementation system supporting the capability of actively pushing data messages. The invention has the following beneficial effects: the invention supports the capability of actively pushing data messages under the condition that a user terminal is offline and satisfies the characteristics under the condition that the user terminal is a mobile node.