The utility model discloses an arc package bag for an arc vacuum heat-insulating board core material. The arc package bag comprises an upper-layer barrier membrane, a lower-layer barrier membrane and a heat-seal side. The arc package bag is characterized in that the lengths of the upper-layer barrier membrane and the lower-layer barrier membrane are as the same as each other, the widths of the upper-layer barrier membrane and the lower-layer barrier membrane are different from each other, and the arc package bag can be produced after one width side and two length sides are thermally sealed respectively. The arc package bag produced by the utility model is specifically used for the heat seal of the arc vacuum heat-insulating board core material, so that the problem of mismatch between a flat type package bag and the arc core material can be avoided, and the arc vacuum heat-insulating board where the arc core material is in tight fit with the arc package bag can be produced after heat seal.