Highway subgrade settlement detection device

The utility model discloses a highway subgrade settlement detection device which comprises a reference unit arranged at a stable reference point of a highway subgrade; the test unit is arranged at a point to be tested in the same width direction as the reference point; the leveling unit is connected between the testing unit and the reference unit; wherein each of the test unit and the reference unit comprises a shell, a support leg for supporting the shell, a bottomless graduated drum which is arranged at the bottom of the shell and is communicated with the shell, and a test component arranged in the shell; the top support and the bottom support are arranged at the two ends of the stepping spring, the pointer is connected with the bottom support and extends into the bottomless scale drum, the top support is fixed to the inner wall of the top of the shell, and the bottom support is arranged in a sliding mode relative to the two side walls of the shell. According to the utility model, the non-uniform settlement