The motion control system of moving components in the Shanghai Synchrotron Radiation Facility (SSRF) Small-angle X-ray Scattering (SAXS) station is an important part of the facility construction,which is applied to accommodate light spots and find the best position of the scattering sample to satisfy the different experiment demands of the users.The system is a distributed control system recognized as the “standard model” in large accelerator laboratories in the world and is developed based on the large-scale software EPICS (Experimental Physics and Industrial Control System).It implements controls for 23 moving components of two four-jaw slits,two slit-bases,a sample-stage and two Beam-Stops.The moving test results indicate that the resolutions of moving components are from 0.333 33 μm to 20 μm and the error is about 1%.The test results can satisfy the requirements of the SAXS station and show advantages in the stability,repeatability and higher precision of the system.Now,the system has been successfully applied to debugging and running in the station.