With the increasing number of multi runway airports in China, it is of great significance to study the optimal design and evaluation method of taxiway operation scheme in maneuvering area of multi runway airport for promoting the intensive and efficient utilization of airport surface resources. The "fixed, one-way, forward and circular" ,which is the design principle of taxiway operation scheme in maneuvering area of multi runway airport is given, as well as the design paradigm of "one-sided operation" and "two-sided operation" taxiway operation scheme for isolated operation scenario of parallel runway; Based on the "flight alternative taxiing path library" and the given basic principles and paradigms of taxiway operation scheme design, it is comprehensively working out to optimize the taxiway operation scheme in the maneuvering area. Taking Chengdu Tianfu International Airport as an example, three alternative operation schemes of taxiway in maneuvering area are designed, and AirTOp software is used for simulation and quantitative analysis for typical daily flight sorties. The results show that the design method of taxiway operation scheme in maneuvering area of multi runway airport is helpful to alleviate flight taxi delay, taxi conflict waiting time and taxi conflict proportion, The simulation evaluation method is suitable for the comparison and demonstration of surface operation schemes under large flight volumn.