The invention belongs to the radar technology field, discloses a high resolution spotlight SAR self-focusing imaging method based on two-dimensional self-focusing and mainly solves a problem that excellent focusing of a uniform imaging area can not be realized through a self-focusing algorithm in the prior art. The method comprises steps that an original echo signal of a target is received, after distance pulse pressure of the echo signal is carried out, crude envelope error and phase error compensation for the signal is carried out; distance direction FFT and azimuth solution linearity frequency modulation operation and two-dimensional interpolation operation are carried out; after distance direction IFFT of a result after two-dimensional interpolation is carried out, distance migration of a distance skipping unit is evaluated, and envelope error correction is accomplished; V non-superposed distance sub blocks are formed through uniform division along the distance direction, and a phase error of each sub block is evaluated; corresponding weights of distance units are respectively calculated, distance errors of the distance sub blocks are evaluated respectively, space-variant error evaluation is accomplished, azimuth direction IFFT of the data after correction is carried out, and thereby SAR images having the excellent focusing effect are acquired.