In the field of geomagnetic measurement, self-exciting dual-cell optical pumping magnetometers have become an important technology for their fast response and high accuracy. Among them, self-exciting dual-cell optical pumping magnetometers excludes phase-shifting circuits, and has simple circuit. The laser frequency stabilization method included a laser temperature control circuit, a feedback circuit, and a laser current source modulation and control circuit. The study applied the frequency stabilization method of injection current modulation to the dual-cell optical pump magnetometer structure. The proposed method reduces the power consumption and volume, with the temperature control accuracy of ±0.002 ℃ and the wavelength stability of 4.36×10-10 within 10 seconds. The research explores the possibility of integrating and miniaturizing self-exciting dual-cell optical pumping magnetometers.