Pure polyethylene glycol mono-acrylate(PEGmA) was extracted out from Polyethylene Glycol Acrylate with different esterification ratios by employing ethyl acetate-saturated NaCl aqueous solution as extraction system. Testing results showed that more than 99% of polyethylene glycol di-acrylate(PEGdA) can be removed with ethyl acetate after 3 repetitions at 15℃. PEGmA remained in water could be extracted out by ethyl acetate at 50℃ with a recovery of 71%~74% by 3 repetitions. PEGmA and PEGdA with purity higher than 99.0% and 98.1% were obtained by washing with mixed aqueous solution of saturated NaCl and Na2CO3 (v/v= 3/1).