A multi-function high-frequency tool for an endoscope, comprising an insert portion (1) and a handle portion (2), the insert portion (1) comprising an insulating tip (101), a first electrode (102) having a needle-knife function, a second electrode (104) having an IT-knife function, and a spray head (105)； the handle portion (2) comprising a first slider (202), a connector (203), an injection connector (204), and a second slider (206). The second electrode (104) has a hollow structure, and the first electrode (102) extends through the second electrode (104)； the proximal end of the first electrode (102) is fixedly connected by means of a mandrel connecting member (109) to the distal end of a mandrel (110)； the proximal end of the mandrel (110) is connected to the first slider (202) of the handle portion (2), and moves axially on the handle portion (2) by means of the first slider (202), thereby causing the first electrode (102) to expose from/retract into the second electrode (104). The first electrode (102) having a needle-knife function achieves the functions such as quickly dotting to mark and cutting a mucous membrane； and the second electrode (104) having an IT-knife function is additionally provided with the insulating tip (101) at its distal end, achieving the functions such as dissecting the tissue and burning a bleeding point to stop bleeding.
