Nowadays SiO/C anode has been considered as the higher energy density energy storage candidate. However, the drastic material expansion and irreversible capacity fading in the prolonged cycling process limits its further application in many dynamic fields. In this article, 4, 5-difluoro-1, 3-dioxolan-2-one (DFEC) is reported as a film forming additive to improve the electrochemical performance of LiNi0.8Co0.15Al0.05O2/SiO@C full cells. The cells with 2% DFEC keeps the best capacity retention of 88.7% after 500 cycles comparing to 83.9% of blank group. The main reason is that the deterioration of the SiO/C particle has been greatly alleviated. As for cyclic voltammograms and scanning electron microscopy measurement, DFEC is reduced over 1.5 V prior to the blank electrolyte in the first cycle, which indicates DFEC can participate in the formation of solid electrolyte interphase film on the anode surface. X-ray photoelectron spectroscopy results demonstrate that there are fewer side reaction products on the DFEC-contained anode.