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A micro measurement system for high speed wind tunnel is developed, which composed of electrical interface module, gain control module, low-pass filter module, scan acquisition module, master control module and LAN bus interface module, realizing voltage signal amplification, low-pass filter, analog digital conversion and data processing and analysis. The static calibration results show that the key performance indicators are equivalent to the conventional wind tunnel measurement system and meet the requirements of wind tunnel test signal acquisition. The system was successfully applied to the standard model’s force test in 2.4 meter transonic wind tunnel, and the comparison test and measurement accuracy test were carried out. The test results were compared with those of the conventional wind tunnel measurement system. The results showed that the precision and stability of the micro measurement system met the test requirements and could adapt the application environment of high speed wind tunnel.