The invention relates to a universal double-sided belt buckle, which comprises a buckle body, a mounting member and a buckle pin, the left end of an upper sheet body and the left end of a lower sheet body are both integrally formed with extension sheets extending downwards, a clamping interval is arranged between the free ends of the two extension sheets, the left side of the mounting member, at the position corresponding to the first end of the buckle pin, is concavely provided with an accommodating recess which is communicated with the through concave cavity and used to accommodate the part of the buckle pin positioned at the mounting member and make it be able to rotate. Compared with the prior art, the buckle body is detachably connected with the mounting member, so that the utilization rate of the buckle body is improved.