A multifunctional high-frequency electrosurgical knife, comprising: a treatment part, a sheath part, and an operating part, wherein the treatment part is located at a distal end of the multifunctional high-frequency electrosurgical knife and comprises: an electrode, configured to cut a tissue and inject a liquid, wherein the electrode is able to be pushed out or retracted relative to a distal end of the sheath part and the electrode has a hollow tubular portion extending in an axial direction; and a clip component, configured to perform hemostasis of a tissue, wherein the clip component is able to be pushed out or retracted relative to the distal end of the sheath part and the clip component comprises a first clamping element, a second clamping element, and a first pin shaft by which the first clamping element and the second clamping element are connected, wherein the clip component is able to be opened and closed by the first pin shaft being driven; the sheath part is located at a proximal end of the treatment part and comprises: a hollow pull rod, wherein the electrode is able to extend distally from its proximal end through an interior of a proximal end of the hollow pull rod, the hollow pull rod is connected to the first clamping element and the second clamping element by means of the first pin shaft, and the hollow pull rod is operable to drive the clip component to be pushed out or retracted relative to the distal end of the sheath part; and an insulating outer tube, having a lumen extending along an axis of the sheath part, in which the hollow pull rod and the clip component are accommodated; and the operating part is located at a proximal end of the sheath part and comprises: a high-frequency connector, connected to the electrode via a wire; a component, driving the electrode to move by means of an operating wire; a member, driving the hollow pull rod to move; and a liquid inlet, allowing a liquid to flow to the hollow tubular portion of the electrode. a treatment part, a sheath part, and an operating part, wherein the treatment part is located at a distal end of the multifunctional high-frequency electrosurgical knife and comprises: an electrode, configured to cut a tissue and inject a liquid, wherein the electrode is able to be pushed out or retracted relative to a distal end of the sheath part and the electrode has a hollow tubular portion extending in an axial direction; and a clip component, configured to perform hemostasis of a tissue, wherein the clip component is able to be pushed out or retracted relative to the distal end of the sheath part and the clip component comprises a first clamping element, a second clamping element, and a first pin shaft by which the first clamping element and the second clamping element are connected, wherein the clip component is able to be opened and closed by the first pin shaft being driven; the sheath part is located at a proximal end of the treatment part and comprises: a hollow pull rod, wherein the electrode is able to extend distally from its proximal end through an interior of a proximal end of the hollow pull rod, the hollow pull rod is connected to the first clamping element and the second clamping element by means of the first pin shaft, and the hollow pull rod is operable to drive the clip component to be pushed out or retracted relative to the distal end of the sheath part; and an insulating outer tube, having a lumen extending along an axis of the sheath part, in which the hollow pull rod and the clip component are accommodated; and the operating part is located at a proximal end of the sheath part and comprises: a high-frequency connector, connected to the electrode via a wire; a component, driving the electrode to move by means of an operating wire; a member, driving the hollow pull rod to move; and a liquid inlet, allowing a liquid to flow to the hollow tubular portion of the electrode.