The invention relates to the field of medical equipment, in particular to a high-stability pneumoperitoneum machine for abdominal surgery, which comprises a pneumoperitoneum machine body, protective plates are mounted at two ends of the pneumoperitoneum machine body, mounting grooves are formed in one sides, away from the pneumoperitoneum machine body, of the protective plates, and limiting mechanisms are mounted in the mounting grooves. A limiting plate and an installation plate are installed at the two ends of the side, close to the pneumoperitoneum machine body, of the protection plate correspondingly and installed on the two sides of the pneumoperitoneum machine body correspondingly, installation holes are formed in the end, away from the protection plate, of the side face of the installation plate, a protection mechanism is installed in one installation hole, and connecting holes are formed in the two ends of the pneumoperitoneum machine body correspondingly. And a fixing mechanism is mounted in the connecting hole. When the device is used, the surface of the pneumoperitoneum machine can be wiped and disinfected, bacteria on the surface of the pneumoperitoneum machine are prevented from making contact with a patient, and the patient can be well protected when the device is used.