The invention belongs to the microwave technical field, relates to relates to a flexible contact method for improving grounding continuity between high-power microwave modules, in particular, a microwave device interconnection method applied to high-power conditions. According to the specific implementation process of the method, a pre-designed reed is fixedly mounted in the joint of a microwave device 1 and a microwave device 2 that need to be interconnected, wherein the reed should be designed based on a gap interval between the microwave device 1 and the microwave device 2 that need to be interconnected, so that the reed can be larger than the interval between the microwave devices when being relaxed, and can be smaller than the interval between the microwave devices when being compressed, and therefore, the good electrical contact of the reference grounds of the two microwave devices can be ensured.