The test platform, composed of components such as a superconducting magnet, Dewar, and cryogenic system can realize the force-thermal-electrical-magnetic multi-field testing of superconductors, in which the superconducting magnet functions to provide a background magnetic field. The split low-temperature superconducting magnet can generate a uniform transverse magnetic field at the center, and its semi-open structure provides convenience and large space for testing. The split low-temperature superconducting magnets operate in low-temperature, strong magnetic fields, and high-current environments, verifying the structure and performance of split low-temperature superconducting magnets is necessary because these conditions can cause the complex electromagnetic forces, thermal stresses, and assembly forces they carry to deteriorate the magnets' electromagnetic performance and stability. The dynamic winding process of superconducting coils, as well as the excitation and cooling processes of the coil assembly, were experimentally studied in the research applying wireless strain testing method and using techniques like cryogenic strain gauges, cryogenic thermal sensors, and Hall plates. The findings demonstrate that the strain accumulated in the coils during dynamic winding is approximately linear with the number of winding layers and falls back slightly with time, and the strain of the coil assembly and the surrounding magnetic field in energized conditions have a high synchronization with the excitation current, the properties of the superconducting magnet testing and processing procedures can be efficiently revealed by the strain evolution law inside the coil.