Modified copolymerized acrylic resin and preparation method thereof, paint and film product

The invention provides modified copolymerized acrylic resin and a preparation method thereof, a coating and a coating product. The modified copolymerized acrylic resin is prepared from the following raw materials: a modified polymer, a comonomer, a hydroxyl functional monomer, an initiator and a first solvent, the comonomer comprises an acrylic monomer; wherein the modified polymer is prepared from the following raw materials: polyamide, aliphatic dihydric alcohol, aliphatic polyhydric alcohol A, maleic anhydride, binary acid and a second solvent; one molecule of the aliphatic polyol A contains three or more hydroxyl groups; the polyamide is prepared from the following raw materials: alicyclic diamine, cyclic anhydride, a functional additive and a third solvent, and the cyclic anhydride contains at least one structure of naphthenic base and aryl. When the modified copolymerized acrylic resin is applied to preparation of a coating, the hardness of the coating after film formation can be improved, and the wear