A portable seal wire cutter is characterized in that the portable seal wire cutter comprises a spindle, a wire spool and a fixed tray, wherein the wire spool is installed movably on the spindle, the spindle and the fixed tray are fixed with each other, and a pair of scissors is arranged on the fixed tray. The adoption of the technical proposal results in the advantages of the utility model as simple structure, convenient usage and carrying, therefore the seal wire can be cut into the required length in accordance with the size of the meter cover at the operation site so as to prevent the material from being wasted; the seal wire is managed in a normalization way, thereby preventing the seal wire from being scattered and entangled after the set of seal wire is cut several times.