The invention discloses a process for synthesizing a binary-copolymerized antiscaling agent. The process comprises the steps: (a) firstly, preparing a chelating group monomer and acrylamide according to a certain proportion; (b) adding the chelating group monomer and acrylamide into a reaction vessel, then, adding a solvent to dissolve, and then, adding a catalyst; (c) stirring to thoroughly and uniformly mix; (d) placing the reaction vessel in a water bath, and reacting for a period of time at certain temperature, so as to obtain a reaction product mixture; (e) cooling the reaction product mixture, filtrating, carrying out reduced-pressure distillation on a filtrate, and separating, thereby obtaining a target product. According to the process, the binary-copolymerized antiscaling agent can be successfully synthesized, the properties of the synthesized binary-copolymerized antiscaling agent are excellent, the synthesizing steps are simple, and the synthesizing cost is low.