In this article， an improved millimeter-wave fast imaging algorithm with range compensation for one-stationary bistatic synthetic aperture radar （OS-BiSAR） is presented. During the process of image reconstruction， the amplitude attenuation factor of the echo model is retained for the compensation of signal propagation loss， and the convolution operation is performed on the receiving array dimension according to the characteristics of the target echo equation. Finally， the target image can be solved by fast Fourier transform （FFT） and coherent accumulation steps. Simulation analysis and experimental results show that， compared to the range migration algorithm （RMA） with range compensation， the proposed algorithm can not only guarantee the efficiency of image reconstruction， but also significantly reduce the influence of signal propagation loss on the image quality.