The invention discloses a transmission method of transmission configuration indication (TCI), network side equipment and terminal equipment The method comprises the following steps: selecting at leastone TCI state from a plurality of configured candidate TCI states to establish a TCI state table from Link type, a channel, an RS type or a CORESET, wherein the TCI state table comprises a corresponding relation between a TCI state and an RS set, or comprises a corresponding relation between the TCI state and the RS set and a quasi-co-location QCL type, or comprises a corresponding relation between the TCI state and a channel type; and sending the TCI state table and the link type, the channel, the RS type or the CORESET identifier corresponding to the TCI state table. According to the invention, the corresponding TCI state table is established based on the link type, the channel, the RS type or the CORESET, so that the TCI state table can be configured according to the requirements of the application scene to meet the TCI state indication requirements under different scenes.