When　taking　pictures　in　extremely　dark　light,　the　image　taken　is　usually　very　dark　and　noisy　due　to　the　small　amount　of　light　entering,　and　there　is　clear　distortion　of　color.　Since　the　method　of　using　multi-frame　or　long-exposure　has　limitations,　we　use　the　single-frame　denoising　method　based　on　residual　dense　network　(RDN),　which　uses　residual　dense　block　(ROB)　to　makes　full　use　of　local　features.　Our　method　has　achieved　better　results　than　state-of-the-art　methods.　In　addition,　we　have　applied　the　trained　model　without　line-tuning　on　photos　captured　by　different　cameras　and　have　obtained　similar　end-to-end　enhancements.