Novel　rosin-based　Gemini　surfactants　(RGS-n)　are　synthesized　from　dehydroabietylamine　and　four　different　N,　N-dimethyl　long-chain　aliphatic　amines.　Compared　with　traditional　surfactants,　the　critical　micelle　concentration　(CMC)　of　RGS-n　is　reduced　by　2　to　3　orders　of　magnitude.　The　three-ring　skeleton　of　dehydrogenated　rosin　can　improve　the　emulsification　of　RGS-n.　Besides,　the　Kraff　points　of　RGS-n　are　less　than　0　degrees　C,　indicating　the　availability　of　RGS-n　at　low　temperature.　RGS-n　exhibits　a　better　cleaning　effect　through　the　combination　of　electrostatic　interaction　with　carboxyl　groups　of　rosin　and　the　emulsification　of　RGS-n.　The　smaller　presence　of　residual　rosin　on　printed　circuit　boards　(PCBs)　after　cleaning　with　RGS-n　indicates　higher　cleaning　performance　of　RGS-n.　The　effect　of　the　length　of　the　hydrophobic　chain　on　cleaning　efficacy　is　analyzed　for　PCBs.　Higher　cleaning　efficacy　is　observed　at　RGS-14.　This　work　has　specific　research　significance　for　Gemini　surfactant　application　as　a　cleaning　agent　in　industrial　circuit　board　cleaning.　(C)　2021　Elsevier　B.V.　All　rights　reserved.