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A portable, miniaturized and automated cables test system is developed to meet the field test requirements of satellite ground test cable and large-scale test sites cable. The system uses embedded computer technology, modular design of functional circuits, and a good human –machine interaction interface. Combined with different supporting transfer cables, the system can realize the access test and insulation test of the largest 100-core satellite ground test cables by practical application. This pater describes the composition of system, working principle, implementation methods of hardware and software and the results of physical operation. The system uses two internal and external power supply modes, which is easy to carry and adapt to various test environments and test sites. The test operation is simple, the test speed is fast, the efficiency is large, and the labor cost and equipment cost are greatly reduced.