The invention discloses a line touching roller capable of quickly changing a line cutter, which comprises a roller, a shaft head
assembly, a line cutter, a plurality of cutter holder assemblies and a plurality of cutter changing assemblies, and each cutter holder
assembly comprises a fixed cutter holder, a movable cutter holder and a spring. When the
wire cutter needs to be replaced, the plurality of cutter replacing assemblies synchronously drive the movable cutter holder to rotate by a certain angle relative to the fixed cutter holder, so that the clamp structure is opened, the clamping effect on the
wire cutter is released, an old
wire cutter is taken down and replaced with a new wire cutter, the cutter replacing assemblies are reset to relieve driving on the cutter holder assemblies, and then the new wire cutter can be clamped. According to the line touching roller capable of rapidly replacing the line cutter, fasteners do not need to be operated one by one, the cutter replacing process is simplified, operation is convenient and efficient, line cutter replacement or specification adjustment can be rapidly completed, and production continuity is guaranteed. The tool apron
assembly achieves reliable matching of a movable tool apron and a fixed tool apron by means of thrust of a spring, the wire tool is clamped stably, the wire tool is prevented from loosening or deviating in the using process, and the wire touching precision is ensured.