In conclusion, we have developed a transition-metal free visible light photoredox-catalyzed remote C(sp 3 )-H borylation reaction, which enabled by 1,5-HAT process based on hydroxamic acid derivatives. A series of mechanism experiments, as well as DFT calculations resolved the radical mechanism in detail. This investigation afforded remote C-H bond functionalization of γ position of carbonyl compounds, thus provided scarce synthetic method of such type. We foresee its application in synthetic community.