Inverse synthetic aperture radar (ISAR) needs to transmit broadband signals. When combined with frequency scanning array, because the phase difference generated by the feeders between the elements of the frequency scanning array can not match the change of the transmitted or received signal frequency, the array has great constraints on the instantaneous bandwidth of the signal during ISAR imaging. In order to solve the above problems, frequency diversity imaging technology is applied to frequency scanning array in this paper. By transmitting single frequency signals with different frequencies at different times, broadband is synthesized, and frequency variation is suitable for beam pointing adjustment of frequency scanning array. This method can not only form the beam to point at the target, but also overcome the limitation of the frequency scanning array in transmitting broadband signal, so as to complete the ISAR two-dimensional imaging. On the basis of this method, the influence of array parameters and target track parameters on imaging is analyzed. Finally, the results show that the proposed frequency diversity ISAR imaging technology can achieve two-dimensional imaging of moving targets on the frequency scanning array.