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In order to solve the problem of the simultaneous application of various aerodynamic testing techniques in the narrow space of the model flight test, and to meet the strict requirements of the model flight test on the reliability and validity of data acquisition, a data acquisition and storage system for model flight test was developed by using the modular design method. The corresponding signal conditioning and acquisition board CARDS are designed for a variety of testing technologies. The external signal conditioning module is abandoned to reduce the system volume and improve the system reliability. The adoption of modular design, stacked connection method, can achieve the flexible use of a variety of test modules, system scalability, maintainability is greatly improved. For the storage module, the software design of logic interlock and a variety of external hardware protection measures are adopted to achieve reliable data recording and complete recovery. After the completion of the development of the system, it has undergone strict environmental test assessment, and has been successfully applied in two aerodynamic model flight tests in 2018, which not only meets the requirements of test accuracy but also can be flexibly extended to achieve complete and effective parameters.