Dumbbell rod capable of avoiding shaking and facilitating length adjustment

The invention relates to the technical field of dumbbell rods, in particular to a dumbbell rod capable of avoiding shaking and facilitating length adjustment, which comprises a dumbbell rod body, limiting discs are welded on the outer wall of the dumbbell rod body, locking grooves are formed in the dumbbell rod body, first external threads are symmetrically arranged on the outer walls of the two ends of the dumbbell rod body, and internal screw grooves are formed in the two ends of the dumbbell rod body; and an extrusion pad and a locking screw pin are arranged on the adjusting baffle disc, an adjusting screw rod is in threaded connection with the interior of the inner threaded groove, an auxiliary adjusting column is arranged on the adjusting screw rod, and a second outer thread and an end stop block are arranged on the auxiliary adjusting column. The adjusting baffle discs on the two sides can be transversely adjusted according to hand sizes with different widths, and the two ends of the hand holding the du