The invention relates to a non-contact flexible direct-current converter valve module deformation detection method, which comprises the following steps: providing a thermal infrared imager, firstly, outputting 16-bit infrared image data and a visible light image by the thermal infrared imager, and converting the 16-bit infrared image data into 8-bit gray level image data; Performing smoothing processing on the two images by adopting histogram equalization and a Gaussian filter to realize image noise reduction; Extracting data features of the two images through a Surf algorithm, and positioningthe direct current converter valve modules in the two images according to a feature point matching algorithm; Obtaining fingerprints of the two images by utilizing an improved perceptual hash algorithm; And finally, judging whether the direct current converter valve module is deformed or not according to the fingerprints of the two images by using the improved Hamming distance; And if the two images are judged to be deformed, determining that the direct current converter valve module is deformed. Whether the direct-current converter valve module deforms or not can be automatically analyzed and judged; The working efficiency is improved and the labor cost is reduced.