In response to the cable layout issues of measurement system in a gas turbine test bed, as well as the problems of insufficient support surface, complexities in external wiring of engine cylinders, and crossing flying lines, an optimized improvement design has been proposed. Through the design of a dedicated cable for storing test cables and optimizing cable laying paths, the existing test stand is retrofitted. The improvement plan includes adding a storage cable above the engine and setting up a single-layer cable or lead column below the engine to enhance the efficiency of engine installation and maintenance.