Allyl methacrylate was synthesized from 3-chloropropene and sodium methacrylate with cetyltrimethylammonium bromide as the phase transfer catalyst. The products were characterized by IR, 1H NMR and the mass spectrometry. The effects of the reaction conditions on yields were investigated. The molar yield could reached 85% when the reaction conditions were as followings: the molar ratio of sodium methacrylate to 3-chloropropene was 1:2.5; the amount of catalyst and the polymerization inhibitor, p-benzoquinone, was 3 wt% and 0.5wt% of the sodium methacrylate, respectively; dimethyl sulfoxide was used as solvent and its volume was 2.25 times of that of 3-chloropropene; and the reaction was stirred at 50℃ for 3 hours.