Test box for simulating influence of environmental climate on soil body

The test box comprises a box body and a box cover, the upper end of the box body is open, the box cover detachably covers the opening in the upper end of the box body, a heater is arranged at the lower end of the box cover and used for adjusting the temperature in the box body, and the box body is provided with a water inlet and a water outlet which are communicated with the interior of the box body. A test station is arranged on the inner bottom wall of the box body, a spray head and a measuring device are arranged above the test station in the box body, the test station is used for vertically placing a sample piece containing a soil sample block, the spray head is used for spraying water onto the sample piece to simulate that rainfall permeates into the sample piece, and the measuring device is used for measuring the expansion and shrinkage amount of the soil sample block. A vacuumizing opening is formed in the side wall of the box body or the upper end of the box cover and used for being communicated with