The invention discloses a multi-data-source roadbed monitoring system for saline soil regions. The system comprises a micro weather station. The micro weather station mounted in a roadbed site comprises a heat radiation sensor, a wind speed sensor, a rain gauge and a relative humidity meter. A displacement meter, a salt sensor, a volume and moisture content sensor, an accelerometer and an earth pressure sensor, which are buried in a roadbed along the depth direction of the roadbed in a layered mode, are electrically connected with a data acquisition and transmission device mounted in the roadbed site through connection lines. The multi-data-source roadbed monitoring system has the advantages that multi-data sources of the roadbed are acquired by the micro weather station and the data acquisition and transmission device, the acquired data are converted into the soil dynamic modulus, net evaporation rate, salt content and roadbed cumulative deformation before correlation analysis, damageto roads in the saline soil regions, such as pavement frost heaving, roadbed settlement and pavement cracking, are monitored, and the evaluation basis is provided for causes and improvement methods of the damage to roadbeds.