Stiff cement soil composite pile model test device and application method thereof

The invention discloses a stiff cement soil composite pile model test device and an application method thereof. The stiff cement soil composite pile model test device comprises a soil body container steel cylinder, and a pile body is arranged in the soil body container steel cylinder; the supporting assembly comprises a vertical support and a transverse support; the loading mechanism is detachably connected with the vertical support and the transverse support, and the output end of the loading mechanism is detachably connected with the pile body; the data transmission system is mounted on the vertical bracket or the transverse bracket; wherein the bottom of the soil body container steel cylinder is provided with a plurality of moving assemblies and horizontal calibration assemblies, a lateral rigidity adjusting module is arranged in the soil body container steel cylinder, the lateral rigidity adjusting module is filled with an experimental soil body, and the pile body is arranged in the experimental soil body