Multifunctional soil-water characteristic curve tester

The invention provides a multifunctional soil-water characteristic curve tester, which is characterized in that the soil-water characteristic curve tester comprises a pedestal, a scouring apparatus is provided on the body of the pedestal, a draining and measuring apparatus is connected with the scouring apparatus, a circle die is arranged on the pedestal, a top cover is arranged on the upper end of the circle die, a heating device of a temperature control apparatus is arranged in the circle die, a sample chamber is formed by cavities below a heating porous plate, an air pressure controlling device is connected with an air inlet pipe, the air inlet pipe is communicated with a sample chamber through an air inlet on the top cover and an hot plate air inlet on the temperature controlling device, a drive rod passes through the top cover and is connected with the temperature controlling device, a deformation measuring apparatus is arranged on the drive rod, the lower part of the sample chamber is communicated with a communication device. The multifunctional soil-water characteristic curve tester is capable of overcoming the defects of the current apparatus, applying normal load on the sample, controlling the temperature, accurately measuring the volume change of the sample and realizing the external accurate measurement of the water displacement. The invention has the advantages of accurate measurement result, complete function and low cost.