The invention discloses a single-side cutter roller lifting device of a wire cutter. The single-side cutter roller lifting device comprises a lifting support, a first lifting mechanism and a second lifting mechanism. The lifting support is provided with a first lifting hole and a second lifting hole. The first lifting mechanism comprises a first connecting rod and a first positioning piece. The first positioning piece is connected with one end, penetrating through the first lifting hole, of the first connecting rod. The second lifting mechanism comprises a second connecting rod and a second positioning piece. The second positioning piece is connected with one end, penetrating through the second lifting hole, of the second connecting rod. According to the single-side cutter roller lifting device of the wire cutter, a cutter roller support and a cutter roller pressing cutter plate can be positioned on the lifting support firstly through the first lifting mechanism and the second liftingmechanism; and then the single-side pulling of the cutter roller pressing cutter plate and a cutter roller connected with the cutter roller pressing cutter plate is adjusted by adjusting the positionof the second positioning piece on the second connecting rod, so that a single-side bearing of the cutter roller can be conveniently inspected or replaced.