Barbell disc convenient to accurately adjust

The invention discloses a barbell disc convenient to accurately adjust, which comprises a first metal sheet, a second metal sheet is arranged on one side of the first metal sheet, arc-shaped empty grooves are formed in the first metal sheet and the second metal sheet, and a circular cavity is formed in the middle position of the first metal sheet and the second metal sheet, and annular grooves are formed in the inner sides of the circular cavities. Through the arrangement of the circular cavity, the annular groove, the connecting rod, the circular disc and the spherical weights, the proper number of spherical weights can be conveniently selected according to needs, the spherical weights can be conveniently assembled, the applicability of the device is improved, the exercise effect can be conveniently improved to the maximum extent through accurate adjustment under the condition of no strain, the barbell discs can be suitable for metal rods with different thicknesses by means of assembling, disassembling and r