This paper presents an integrated multi-parameter sensing system that combines a Brillouin optical time domain reflectometer (BOTDR) and phase sensitive optical time domain reflectometer (φ-OTDR) to simultaneously measure temperature, strain, and vibration information of the sensing fiber. A double heterodyne detection structure was set up to multiplex the signal, and the scattered light splitting ratio was optimized. For a sensing distance of 8.6 km and spatial resolution of 3 m, the temperature and strain measurement accuracy of the system are 0.48 ℃ and 18.15 με, respectively. The vibration measurement results show that the system has a maximum frequency response of 5 kHz and a dynamic strain resolution of 8.48 nε/√Hz at 100 Hz.