This study focuses on the development of an airborne wireless flexible distributed testing system to address the challenges of large space occupation, high cable usage, complex wiring, and numerous testing channels in flight experiments. The distributed system consists of nodes distributed at different locations, and the internal clocks of these nodes may become unsynchronized due to various factors, which can affect the accuracy of data acquisition. By employing a flexible time slot allocation mechanism, the AUTBUS bus can be dynamically adjusted to ensure efficient and stable communication within the system. The synchronization of all network node devices is achieved through the utilization of 1PPS, TOD, and AUTBUS bus-based timing algorithms, ensuring synchronized operations among all nodes based on the same time reference. The synchronous data acquisition of the testing data is accomplished through an externally triggered analog-to-digital conversion module, enabling the synchronized data collection of all nodes during coordinated events across the network. The test results demonstrate that the system achieves a synchronization data acquisition accuracy of 822.5 ns, meeting the data acquisition requirements for airborne testing in flight experiments.