Model test system for unsaturated soil mechanical properties

The utility model discloses a model test system for unsaturated soil mechanical properties, which comprises a model box, a loading device and a measuring device, and is characterized in that the modeltest system comprises a box body and a box cover, the box cover covers an upper port of the box body, a rolling diaphragm and a sealing element are arranged at the joint of the box cover and the boxbody, and two observation windows are arranged on one side surface of the box body; the horizontal interval between the two observation windows is 600 mm, the width of each observation window is 100 mm, and the height of each observation window is the same as the height of the box body; according to the device, vertical load loading is carried out on a soil sample in the box body through the loading device, then data acquisition is carried out through the measuring device, and the device is easy to operate, clear in principle and capable of simulating strength, strain, water seepage and gas permeation characteristics a