We present a novel scheme for the accurate ranging for the multi-region in the rectangular-shape target using numbers of the chaotic x polarization components in the multiple parallel optically pumped spin-VCSELs with optical injection, where these chaotic x polarization components possess the attractive features of the uncorrelation in time and space under different optical injection strengths, and fast dynamic with femtosecond magnitude. Utilizing these features, the accurate ranging to the position vectors of the multi-region targets can be achieved by correlating the multi beams of the time-delay reflected chaotic polarization radar probe waveforms with their corresponding reference waveforms. The further investigations show that the ranging to the multi-region targets possesses very low relative error, which is less than 0.28%. Their range resolutions can be achieved as high as 0.9mm, and exhibit excellent strong anti-noise performance by the optimization of some key parameters such as the injection strength, the amplitude of external light, linear birefringence, spin relaxation rate. The precise ranging to the multi-region targets based on the multiple parallel optically pumped spin-VCSEL with optical injection offers interesting perspectives for the potential applications in quality detection of the multi-region surfaces.