Virtual cutting device for tangent lines

The invention relates to a virtual cutting device for tangent lines. The virtual cutting device is used for processing virtual tangent lines of living paper. The virtual cutting device for the tangent lines comprises a virtual cutting part which is provided with a lower knife rest and a matched upper knife rest, wherein a bed knife is arranged on the upper knife rest; at least two virtual cutting knives are arranged on the lower knife rest; and the at least two virtual cutting knives rotate through the lower knife rest and can match with the bed knife for carrying out virtual cutting operation.