The invention discloses a power information intranet message encryption release method based on a VXLAN (Virtual eXtensible LAN) technology, and belongs to the technical field of power system dispatching and monitoring distant transmission. In a power system, longitudinal link distant transmission must pass through a national authenticated longitudinal encryption device to ensure security transmission of information, but has the defect that the longitudinal encryption device cannot encrypt broadcast and multicast messages. A two-layer network function of a VXLAN is realized by using a gateway VXLAN router to realize packaging of the VXLAN on broadcast, multicast and IP data messages, then encryption is realized via a longitudinal encryption device tunnel according to a strategy, and the whole process is executed inside the gateway VXLAN router and the longitudinal encryption tunnel, so that distant encryption transmission of multicast and broadcast data messages is realized, the security of message transmission is improved, and the waste of link bandwidth is reduced.