A narrowband imaging method for space target with compound micromotion is proposed. Due to the advantages of narrowband radar in target detection and tracking, narrowband radar is widely used in space target detection. For space target with micromotion, there is timevarying Doppler modulation induced by micromotion, which contains the important structural information of the target. By applying the inverse Radon transform (IRT) method on the timefrequency image, the position of scattering centers of the target can be obtained and the narrowband imaging can be achieved. Narrowband imaging reduces the requirement of radar bandwidth and has advantages in space target detection. However, in the real detection scene, the target motion is composed of micromotion and translation, which makes the narrowband imaging method invalid. In this paper, based on the radar echo model of space target with compound micromotion, the timevarying Doppler modulation characteristics of the target are analyzed, and a narrowband imaging method for compound micromotion is proposed. Firstly, the micromotion period is estimated based on the timefrequency correlation coefficient. Then the translational influence is removed by the Doppler cancellation method, the target translational parameters are estimated, and then the translational compensation is achieved. Finally, the narrowband imaging is achieved based on the IRT. The proposed method is not affected by the target translation, and can effectively achieve the narrowband imaging for space target with compound micromotion.