Soil body triaxial sample wetting-drying test device and test method thereof

The invention discloses a soil body triaxial sample wetting-drying test device, comprising a text box that can be movably opened, wherein the text box is placed in an oven, the text box and a top plate of the oven are respectively provided with a hole, a weighing mechanism is disposed at the outside of the top plate of the oven, the weighing mechanism is connected with a string, the string passesthrough the hole and is connected with a sample side limiting structure located in the test box, an indoor humidifier is disposed in the test box near the sample side limiting structure, and a drain pipe is disposed at the bottom of the test box. The soil body triaxial sample wetting-drying test device disclosed by the invention adopts an atomization humidification mode to humidify the sample, sothat the humidification process is moderated, and the sample is not directly immersed in the water, which conforms to the actual engineering that a roadbed body is not in direct contact with water inthe actual engineering due