Provided is a uterine resection tool, comprising: a pump body assembly (1); a balloon assembly (2), comprising an expansion water-injection two-way valve (21), an expansion outer tube (22), a balloon catheter (23), and an inflation balloon (24); the expansion water-injection two-way valve (21) is located on the side of a pump body assembly (1); one end of the expansion outer tube (22) is connected to the expansion water-injection two-way valve (21); one end of the balloon catheter (23) is in communication with the expansion water-injection two-way valve (21), and the other end runs through the expansion outer tube (22); the expansion balloon (24) is in communication with the other end of the balloon catheter (23); an endoscope module (3), which runs through the expansion outer tube (22) and is located on one side of the pump body assembly (1); a water jet cutter assembly (4), which runs through the endoscope module (3) and connects to the pump body assembly (1). The water jet cutter assembly (4) and the endoscope module (3) and balloon assembly (2) are split structures; the endoscope module (3) and balloon assembly (2) can be disinfected and reused, reducing the financial burden on patients; furthermore, doctors and observers can view images of a patient's uterus in real time by means of an external workstation, and the patient's uterus can be examined in detail, increasing the safety of an operation.