Abstract: Automatic testing of micro-satellites is an important means to improve the efficiency of testing, shortening development cycle, reducing development costs, and ensuring the reliability. A micro-satellite ground automatic test system real-time database deployment was designed against large quantity test data, complex data types, and tough real-time demand. A test data related real-time database transaction scheduling model was established and an abnormal data first (ADF) priority assignmet algorithm was presented based on the model. Finally, the efficiency, accuracy, and effectiveness of ADF assignment algorithm were validated by using mathematical simulation. The established transaction scheduling model and priority assignment algorithms took into account the characteristics and real-time requirements of test data and emphasized the abnormal data processing, thereby improving the accuracy and comprehensiveness of the test.