The invention discloses a time division duplex/time division multiple access channel plan frame encoding method which mainly solves the problem that the conventional channel plan frame encoding efficiency is low. The method comprises the following implementation steps: setting a network environment, and determining the number of central nodes and slave nodes in the network; defining K code words comprising (K-1) purpose code words and one node separator code word according to the specific time slot purpose, and encoding the K code words; then determining a time slot distribution result in the next plan period, and putting the purpose code words at the corresponding positions in the plan frame according to the time slot distribution result in the next plan period; and finally, inserting the node separator code word to finish the channel plan frame encoding. According to the method, the channel plan frame encoding length is effectively reduced, the overhead of the plan frame during channel transmission is reduced, the channel utilization rate is improved, the equipment requirement is low, and the method can be applied to the fields of various local area networks and access networks by employing time division duplex/time division multiple access communication.