The utility model relates to the technical field of tripods, in particular to a locking structure of a tripod bracket, which comprises a gear shaft and a sliding sleeve, the gear shaft is rotatably mounted on a
tripod head of a tripod, a gear on the gear shaft is arranged in a through cavity and meshed with a rack part on the bracket, one end of the gear shaft is provided with an
optical axis surface and an embedding surface, and the other end of the gear shaft is provided with a sliding sleeve. The gear shaft is provided with an embedded surface, the embedded surface is provided with a plurality of grooves which are arranged in an
annular array mode, the embedded surface is located at the end of the gear shaft, the sliding sleeve is provided with a hole, the hole wall of one end, close to the holder, of the hole is provided with a plurality of protrusions which are arranged in an
annular array mode, and the protrusions extend into the grooves or are located on the outer side of the
optical axis surface. When the protrusion is located on the outer side of the
optical axis face, the gear shaft does not rotate when the sliding sleeve is rotated, and the
advantage that when the rotating piece rotates selectively, the bracket is driven to move is achieved.