Root soil friction force and root system tensile resistance testing device and method

The invention provides a root soil friction force and root system tensile resistance testing device and method, and belongs to the technical field of tensile resistance measurement, and the device comprises a test bed, a drawing system, a connecting ring assembly, a temperature control system, a confining pressure system and a control and data acquisition processing system; a clamp chamber and a constant temperature chamber are arranged in the test bed, and the clamp chamber is located above the constant temperature chamber. The drawing system is arranged on the test bench, and at least part of the drawing system is embedded into the clamp chamber; the connecting ring assembly comprises a first connecting ring and a second connecting ring, a first annular cooling pipe and a second annular cooling pipe are arranged in the first connecting ring and the second connecting ring respectively, and the first connecting ring and the second connecting ring are arranged above and below the root-soil complex sample respe