Disclosed is a new-type infusion pump alarm device, comprising an infusion element, a pressure variation assembly and an alarm element (406). A flexible isolating surface (407) is provided between the infusion element and the pressure variation assembly, and the flexible isolating surface (407) senses the hydraulic pressure from the infusion element and transmits same to the pressure variation assembly. The alarm element (406) starts an alarm when the intensity of pressure in the pressure variation assembly decreases to a pre-set alarm value. Further disclosed is an infusion pump alarm method, that is, the intensity of pressure in the pressure variation assembly changes with the value of the hydraulic pressure in the infusion tube, and the alarm is started when the intensity of pressure in the pressure variation assembly decreases to the pre-set alarm value. The device has simple structure, low cost, high sensitivity, and high specificity, can give an alarm more accurately and avoid the influence of light interference from the infrared light-controlled alarm on the liquid medicine so as to improve the safety.Linvention concerne un nouveau type de dispositif dalarme dune pompe à perfusion comprenant un élément de perfusion, un ensemble de variation de pression et un élément alarme (406). Une surface isolante flexible (407) est disposée entre lélément de perfusion et lensemble de variation de pression, et la surface isolante flexible (407) détecte la pression hydraulique provenant de lélément de perfusion et la transmet à lensemble de variation de pression. Lélément alarme (406) démarre une alarme lorsque lintensité de pression dans lensemble de variation de pression diminue jusquà une valeur dalarme prédéfinie. Linvention concerne en outre un procédé dalarme de pompe à perfusion, cest-à-dire, lintensité de la pression dans lensemble de variation de pression change avec la valeur de la pression hydraulique dans le tube de perfusion, et lalarme est démarrée lorsque lin
