Novel guar gum-g-poly(sodium acrylate-co-styrene)/sepiolite(GG-g-poly(NaA-co-St)/ST)superabsorbent composites were synthesized by grafted copolymerization in aqueous solution using ammonium persulfate（APS） as initiator and N

N′-methylenebisacrylamide (MBA)as crosslinker.The effect of St and ST contents in superabsorbent composites on swelling capacity and swelling rate was investigated and the results showed that the optimum St and ST contents were 24.3 mmol·L-1 and 10%（mass）

respectively.The swelling behavior of the superabsorbent composites in solutions of different salts (NaCl

CaCl2

AlCl3)and pH values was also studied.The experiment results indicated that the polymeric network structure of GG-g-poly(NaA)could be improved by introducing a proper amount of St and ST

and then the swelling capacity and swelling rate of the superabsorbent composites increased by 46.1% and 62.7%

respectively.