The invention provides a synchronization control method used for a space optical remote sensor servo system. Position servo commands of a main shaft scanning system and a slave shaft scanning system are designed by utilizing a preset index requirement; a main shaft tracking error controller is designed so that rotating scanning movement control performance of the main shaft system is enabled to meet a preset scanning linearity requirement; a slave shaft tracking error controller is designed so that the closed-loop characteristics of the slave shaft tracking error controller are enabled to be identical to those of the main shaft tracking error controller; and a synchronization error controller is designed so that the stable 0 tracking command of the two-shaft servo system is enabled to be stable, thetaxk<2> is added at the output end of the synchronization error controller and output of the main shaft tracking error controller is subtracted so that a synchronization control closed loop is formed, and synchronization control of the space optical remote sensor two-shaft servo system is completed. Compared with master command reference type synchronization and master-slave reference type synchronization, two-shaft synchronization movement precision is greatly enhanced by the method without influencing movement tracks of a main rotating system.