As the key components of modern light source

insertion devices affect performance directly of the light source.Due to technological limitations in manufacturing and installation of an insertion device

its magnetic field may well disturb the electron beam orbit.One solution to this problem is to add correction coils at both end of insertion device.A front-end feedback system

based on EPICS architecture

has been developed at SSRF for the elliptically polarized undulator(EPU10).It has been demonstrated that this feedback system has enhanced stability of beam current

with concise interface

complete functional control and real time control

hence the guaranteed higher quality of synchrotron radiations from the insertion devices

for the soft X-ray beam line and stations.