The invention discloses a channel allocation method in a multi-radio frequency multi-channel wireless Mesh network. The channel allocation method comprises steps that a wireless Mesh network topological structure comprising orthogonal channels used for network allocation and a neighbor node set of various nodes are established; the channel allocation of the radio frequencies of the network nodes is carried out, and one node of the network is selected, and is set to be a current node, and by considering the current node and the channel allocation condition of the radio frequency of every node in the neighbor node set of the current node, different processing ways are selected according to the possible scene states of the two nodes, and therefore the channel allocation corresponding to different radio frequencies of all of the nodes is determined sequentially. The new channel allocation method in the multi-radio frequency multi-channel wireless Mesh network is advantageous in that objects of better inhibiting inter-channel interferences and improving the integral performance of the wireless Mesh network are realized.