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Icing is an important factor affecting the safety of aircraft flying, before a kind of aircraft putted into use, the performance of the aircraft’s anti-icing system needs to be verified. Therefore , a set of airborne icing spray control system based on μC/OS-III is presented. This kind of system is able to control spray device’s water and gas’s temperature and pressure automatically , moreover, the system has a display parameter monitoring, alarm systems, and data analysis and saving. Flight tests show that the system has advantages of high reliability, real time , adjust quickly ,control precisely, so can be used to test the performance of the aircraft’s deicing/anti-icing system.