High-stability guide mechanism capable of adjusting dumbbell

The utility model relates to the technical field of dumbbells, in particular to a high-stability guide mechanism capable of adjusting a dumbbell, which comprises a dumbbell rod with external threads, a limit disc is arranged on the outer wall of the dumbbell rod, the center position of the limit disc penetrates through the dumbbell rod, and the joint position is fixed by welding. The limiting discs are symmetrically distributed with respect to the rod center point of the dumbbell rod, the first dumbbell disc, the second dumbbell disc and the third dumbbell disc are symmetrically arranged on the surface of the dumbbell rod, and the first dumbbell disc, the second dumbbell disc and the third dumbbell disc are each of a hexagonal structure. The first dumbbell disc, the second dumbbell disc and the third dumbbell disc are sleeved and stacked with the dumbbell rod layer by layer, the installation position is positioned through the limiting disc, the number of the dumbbell discs can be increased or decreased accord