In this paper, Dodecenyl succinic anhydride(DDSA), Octadecenylsuccinic Anhydride(ODSA), and Octenylsuccinic Anhydride(OSA) with catalyst TMAOH was used to modify guar gum in 1-Butyl-3-methyl imidazolium chloride ionic liquid. The modified guar gum exhibit good retention and drainage properties in reconstituted tobacco pulp. The results of this study demonstrated that the modified guar gum could be used as a useful retention and drainage aid in reconstituted tobacco pulp.