Efficient and portable gasket cutting tool

The utility model relates to the technical field of cutting tools, in particular to an efficient and portable circular gasket cutting tool. An efficient and portable gasket cutting tool comprises a cross beam support and is characterized in that scales are arranged on the cross beam support, a center positioning shaft is arranged at the starting end of the cross beam support and rotatably installed on the cross beam support through a bearing, and a positioning handle is installed at the upper end of the center positioning shaft; an inner diameter cutter sliding block and an outer diameter cutter sliding block are further arranged on the cross beam support, the inner diameter cutter sliding block and the outer diameter cutter sliding block are both installed on the cross beam support in a sliding mode, a first fixing handle is arranged at the upper end of the inner diameter cutter sliding block, an inner diameter cutter is arranged at the lower end of the inner diameter cutter sliding block, a second fixing ha