The present invention belongs to the automatic test and avionics field and discloses a universal test system for avionics. According to the universal test system of the invention, an ICD parsing layeris additionally adopted based on the prior art, so that the testing of novel avionics can be realized without changing test equipment source codes when the ICD of a tested object is changed, and at the same time, the robustness of the testing device codes can be increased, and therefore, a condition that the stability and use of test equipment are influenced due to frequent change can be avoided,the efficiency of the production and debugging of the avionics can be improved, and the universality and expansibility of the test system in the automatic test and avionics field can be ensured.