Abstract: In order to improve the stability of frequency control of 1083 nm Distributed Bragg Reflector (DBR) laser for high sensitivity 4He magnetometer, we propose a new polarization heterodyne saturated absorption spectroscopy (PHSAS), which would form a frequency discrimination curve using the differential signal of both saturated absorption spectra of metastable helium atoms in two mutually perpendicular polarization directions. It has been theoretically showed that this spectral technique can increase the amplitude of the resonant signal by 50%, meanwhile eliminate completely the influence of Doppler background near resonance and suppress the common-mode noise of the laser, thereby improve the stability of the laser frequency controlled by traditional saturated absorption spectrum (SAS) spectroscopy. In comparison with SAS used to control laser frequency, our experiment demonstrates this proposed method can increase spectral amplitude by 20% and obtain Allan deviation of 6.9×10-10@10s experimentally, which is five-fold reduction. Considering the influence of the experimental environment, the experiment has verified the theoretical expectations.