The invention relates to an intelligent scanning electronic transformer combination unit characteristic testing method based on feedback. According to the method, a scanning strategy is dynamically adjusted based on feedback information of a combination unit, multiple paths of electronic transformer body digital signals are finally simulated, the technical barrier of semi-private communication between a transformer body and the combination unit is overcome, the defect that the electronic transformer body and the combination unit can only be tested overall is overcome, the hidden danger due to the fact that the performance of the combination unit can not be independently verified and tested is eliminated, and technical improvement of the combination unit and the electronic transformer is guaranteed. The scanning process of multiple ports of the combination unit is automatically judged based on the feedback information, the strategy is adjusted, the operation is rapid and accurate and does not need artificial judgment, and the intelligence degree of the test is high.