The invention discloses a thin-wall pipe chipless cutting device comprising a fixed base, a fixed cutting mode, a rotary jacket, a rotary sleeve, and a fixed sleeve. A movable cutting mode matched with the fixed cutting mode is arranged in an outer mold base. A core rod assembly is arranged in the fixed and movable cutting modes in a penetrating way. The core rod assembly comprises a positioning piece. A connecting base, a fixed core rod and a movable core rod are sequentially arranged on the positioning piece. The movable core rod is provided with an installation through hole inside. A guide bolt is installed in the installation through hole in a penetrating way. The cap of the guide bolt presses against the end face of the movable core rod. The end of the guide bolt is arranged in a penetrating way in a threaded hole arranged in the end of the fixed core rod. The guide bolt is sleeved with a pressure spring in the position corresponding to a pressure spring installation section. The thin-wall pipe chipless cutting device of the invention is simple in structure, low in manufacture cost, and convenient to install. The invention further discloses a thin-wall pipe chipless cutter based on the thin-wall pipe chipless cutting device.