Robot joint connecting structure

The utility model discloses a robot joint connecting structure, and particularly relates to the technical field of joint connecting structures, the robot joint connecting structure comprises a linkage ring used for robot joint connection, and the top end of the linkage ring is provided with a movable assembly used for robot joint movement; a supporting assembly used for supporting a robot joint is arranged at the bottom end of the linkage ring. And a linkage assembly for linking the movable assembly and the supporting assembly is arranged outside the linkage ring. Through the threaded connection of the positioning sleeve and the linkage ring, the positioning sleeve can be operated to move up and down, so that the separation or connection of the positioning clamping jaw and the positioning groove can be adjusted, the positioning clamping jaw is embedded into the positioning groove for fixation through downward movement and extrusion, the positioning clamping jaw moves upwards without pressure, and the position