The invention discloses a method for removing interference on radar imaging caused by object micro-motion. The method of the invention comprises steps of emitting M identical N-dimension discretized linear frequency modulation signals by a radar, obtaining an M-row and N-column two-dimensional distance-slow time domain echo data after an emitted signal and a received echo signal go through matched filtering, 2) performing compound variational mode decomposition on the distance-slow-time domain echo data of each column to obtain q modular functions, calculating energy of each modular function which is decomposed out, solving a ratio of energy of each modular function to energy of all modular functions, performing summation synthesis on the modular functions, the ratios of which are higher than a threshold to obtain new M-row N-column two-dimensional distance-slow-time-domain echo data and 3) performing windowing processing on the echo data of the M-row N-column two-dimensional distance-slow-time-domain which is obtained from the step 2 and then performing Fourier transformation along an azimuth to obtain an inverse synthesis aperture radar imaging.