An electrohydraulic prostate tissue treatment probe comprises a probe pipe body (10). A drainage channel (2-1), a water-injection channel (1-1), a gas-injection channel (3-1) and a cathode channel (5) are arranged in the probe pipe body (10) along the axial direction. The front end of the probe pipe body (10) is a guiding head (9), behind which a positioning balloon (8) is arranged. An external cathode electrode (7) is wound tightly around the probe pipe body (10) on the rear side of the positioning balloon (8). The leading-out end of the external cathode electrode (7) is connected with a cathode plug (A) through the cathode channel (5). An external anode electrode (6) is arranged between the positioning balloon (8) and the cathode electrode (7), and is wound around the probe pipe body (10) by at least one circle. The external anode electrode (6) is kept at a distance from the cathode electrode (7). The leading-out end of the external anode electrode (6) is connected with an anode plug (B) through the drainage channel (2-1).
