The invention discloses a high-precision synthetic aperture radar imaging method. The high-precision synthetic aperture radar imaging method includes the steps that down-conversion, demodulation and range Fourier transform are sequentially performed on echo signals received by a synthetic aperture radar, the transform result is multiplied by a range pulse compression reference function, and then a signal S(t,f) is obtained; the signal S(t,f) is multiplied by an interpolation error precompensation function given by an interpolation algorithm, inverse Fourier transform is performed after range frequency spectrum zero-padding, and then a signal s(t,r) subjected to range compression and interpolation error precompensation is obtained; azimuth Fourier transform is performed on the s(t,r), range migration correction is performed according to the set interpolation algorithm, and a range Doppler signal S(f,r) is obtained; the range Doppler signal S(f,r) is multiplied by an azimuth pulse compression reference function, then azimuth inverse Fourier transform is performed, and then a high-precision synthetic aperture radar image is obtained. According to the high-precision synthetic aperture radar imaging method, targeted compensation is made for the error, and the high-precision synthetic aperture radar imaging method is high in imaging precision, simple in calculation, small in operation amount, short in occupied transposition processing time and small in occupied storage space, and the processing procedure is simplified.