In order to reduce the Doppler shift in the process of time-frequency transmission and improve the reliability of inter-satellite communication, a Doppler shift compensation technique is proposed. Firstly, the Doppler shift is analyzed theoretically and simulated, and the Doppler shift is obtained when the two satellites transmit the laser optical frequency before the communication is interrupted for 24 h. Then, a Doppler shift compensation system is designed for intersatellite laser Doppler shift compensation. The simulation results show that the system can complete Doppler shift compensation in about 15 control cycles, making the compensated Doppler shift less than 8 kHz, which is 6 orders of magnitude better than the uncompensated condition.