Abstract: In this paper, X-DR imaging technology is applied to the visualization nondestructive testing of basin-type insulator. Without dismantling and destroying the GIS device, it can realize the radiography and defect detection of basin-type insulator. The optimal parameters of the X-ray machine are found by orthogonal test method, which can greatly reduce the number of experiments and improve the efficiency of the experiment. The results show that the X-DR imaging technology can be used to identify the cracks and bubble defects of the basin-type insulator.