The invention relates to a node fast switching mechanism under a wireless multi-hop chain-typed topological network. According to the node fast switching mechanism under the wireless multi-hop chain-typed topological network, in a wireless communication network where a mobile terminal is in wireless connection with a connection base station node, the connection base station node can be in communication with a forward neighbor base station node, a backward neighbor base station node and indirect adjacent base station nodes of the connection base station node, and connection communication information corresponding to the forward neighbor base station node, the backward neighbor base station node and the indirect adjacent base station nodes are obtained; when the mobile terminal moves and triggers connection switching, the connection base station node determines the moving direction of the mobile terminal and transmits base station connection information which can be accessed on the moving direction of the mobile terminal to the mobile terminal, so that the mobile terminal can be switched and connected to a needed target base station node according to the received base station connection information capable of being accessed. By means of the node fast switching mechanism under the wireless multi-hop chain-typed topological network, the consumed time for switching can be reduced, seamless switching of service data is met, and the safety and the reliability are achieved.