This study presents a method for controlling the intensity consistency of multi-wavelength micro-interferometry. A white LED with tunable intensity is used as the multi-wavelength source. A detector is placed in the micro-interferometry optical path to detect intensity of light emitted from different filters, and the signal is fed back to an STM32 microcontroller in real time. Light intensities from different optical filters are quickly adjusted to be consistent using PID (proportion integration differentiation) control method and multi-wavelength interferograms with consistent gray distribution are obtained. The experimental results show that the presented method can quickly adjust the illumination intensity at different wavelengths, accurately stabilize at the set value, and reduce interferogram contrast error from 18% to 2%.