An apparatus for spraying liquid medicine in an endoscope clamping channel, comprising a handle (5), an outer tube (1), a middle tube (2), an inner tube (3), and a protective apparatus (4). The distal end of the outer tube (1) is fixedly connected to the handle (5), the inner tube (3) is sleeved inside the middle tube (2) and the middle tube (2) is sleeved inside the outer tube (1), a handle pusher (51) is disposed in the handle (5), and the distal end of the inner tube (3) and the distal end of the middle tube (2) are both fixedly connected to the handle pusher (51). The protective apparatus (4) is sleeved between the inner tube (3) and the outer tube (1), the proximal end of the protective apparatus (4) being in contact with the distal end of the middle tube (2), and the head of the proximal end of the inner tube (3) being provided with a spray head (32). Operation of the present spraying apparatus is simple； by just operating the handle (5), the inner tube (3), the middle tube (2), and the protective apparatus (4) can be simultaneously pushed out； the protective apparatus (4) and a protective film cover are arranged outside the spray head (32) of the inner tube (3) to prevent the medicine from contaminating the inner lens, and the inner cavity of the patient can be sprayed； and, after use, the inner tube (3), the middle tube (2), and the protective apparatus (4) can simultaneously retract into the outer tube (1), without affecting the endoscopic operation.L'invention concerne un appareil de pulvérisation de médicament liquide dans un canal de serrage d'endoscope, comprenant une poignée (5), un tube externe (1), un tube central (2), un tube interne (3) et un appareil de protection (4). L'extrémité distale du tube externe (1) est reliée de manière fixe à la poignée (5), le tube interne (3) est emmanché à l'intérieur du tube central (2) et le tube central (2) est emmanché à l'intérieur du tube externe (1), un poussoir de poignée (51) est disposé dans la poignée (5),
