Variable-size pipe cable comprehensive loading ultralow-temperature experiment platform

The invention relates to a variable-size pipe cable comprehensive loading ultralow-temperature experiment platform, and relates to the technical field of pipe cable structure testing. Comprising a constraint module, a mechanical loading module and a low-temperature loading module, the constraint module is used as a bearing part of the experimental platform, is used for mounting and adjusting the position of the mechanical loading module, and is used for bearing a load during a test and adjusting the length of a frame according to the length of a sample; the mechanical loading module is used for applying bending, stretching, twisting, internal pressure and combined load to the pipe cable; and the low-temperature loading module is arranged on one side of the restraining module and is used for providing a low-temperature experiment environment for the pipe cable. The device has the loading functions of stretching, bending, twisting, extruding and combined load, the basic mechanical property test of the pipe cabl