The laser beam stabilization system facilitates high-precision correction of the laser beam via the control of the beam position and angle， providing long-term stability. It plays an important role in micro/nano-laser direct writing and super-resolution imaging. In this paper， a miniaturized laser stabilization system with error separation technology， which eliminates the coupling error caused by traditional dual-mirror controlling and improves the performance of laser beam stabilization control， is proposed. Comparative experiments indicate that the laser stabilization system based on this method stabilized the beam position with an accuracy better than 0.3 µm （RMS） and stabilized the angle with an accuracy better than 1 µrad （RMS）. The results of test experiments with active disturbance indicate that the system maintained the same performance. Compared with two commercial laser stabilization systems under the same conditions， the proposed system can yield 50% lower position and angle jitter.