A buried intrusion monitoring system has the characteristics of strong concealment, little affected by natural factors, low false alarm rate and high identify probability, and plays an important role in intrusion monitoring. The main technical scheme for security intrusion monitoring based on fiber sensing is introduced. The working principles of the fiber distributed vibration sensing (DVS) system and the fiber Bragg grating (FBG) vibration sensing system are described. Personnel invasion monitoring experiments for the two systems are carried out. The results demonstrate that the maximum effective detection range of the DVS system is 10-15 m, and the spatial resolution is about 20 m. The maximum effective detection distance of the FBG vibration sensing system is beyond 75 m. The key performances of the two systems are compared and evaluated, and the application of buried fiber intrusion monitoring system is also discussed.