With maleic anhydride as raw material, hydrogen peroxide as oxidan, and sodium tungstate as catalyst, the intermediate epoxy succinic acid(ESA) is synthesized. Then, with epoxy succinate (ESA), acrylic acid (AA) and 2-acrylamido-2-methyl propane sulfonic acid (AMPS) as raw materials, and ammonium persulfate as initiator, a new type of green scale inhibitor ESA/AA/AMPS copolymer is synthesized. The overall inhibiting performence and the capacity of stabilizing zinc are evaluated by the static scale method. The test results show that ESA/AA/AMPS copolymer''s inhibiting ability for calcium carbonate scale is roughly equal to PESA, and its ability in resisting calcium phosphate scale, calcium sulfate scale and the capacity of stabling zinc are significantly better than PESA.