The invention relates to an anti-intrusion alarming system. The anti-intrusion alarming system comprises at least one piece of optical fiber intelligent processing equipment, at least one patrol sentry alarming processing unit and a sensing optical cable unit, each patrol sentry alarming processing unit comprises an optical fiber intelligent alarming host and a data processing host, the optical fiber intelligent processing equipment comprises an intelligent optical front end processor and an intelligent optical terminal processor, the optical fiber intelligent alarming host is connected with the optical front end processor through a transmission cable, the optical fiber intelligent alarming host comprises a light source mechanism, a photoelectric information processing mechanism and a linkage output mechanism, the data processing host comprises a data acquisition mechanism and an alarming mechanism. Therefore, the optical fiber intelligent alarming host and the data processing host arearranged in a matching way, the various intrusion behaviors are found in time, the mode of the intrusion behavior is matched, the anti-intrusion alarming system has the advantages of high reliabilityand high locating precision, the labor intensity of a staff is effectively reduced, and the working efficiency is improved.