To solve the problems of low resolution and serious energy leakage when using the traditional Range-Doppler (RD) algorithm to achieve bistatic ISAR imaging, a bistatic ISAR sparse aperture high resolution imaging algorithm based on ROMP algorithm is proposed. Firstly, a bistatic ISAR sparse aperture imaging model based on compressed sensing is established. Secondly, the ROMP algorithm is used to realize bistatic ISAR high resolution imaging. Finally, the effectiveness and superiority of the proposed algorithm is verified by the simulation experiment.