Abstract: Methacryloxy ethyl trimethyl ammonium chloride (DMC) -ethyl acrylate (EA) -glydyl methacrylate (GMA) and DMCEA-GMA-methyl methacrylate (MMA) copolymers were synthesized by free-radical solution polymerization, and the antifouling coatings were prepared.The measurement results show that shear strength of the coatings decreases and Cu²⁺ release rate increased with increasing DMC amount, and tensile strength and Cu²⁺ released rate of the coatings increased with increasing MMA amount.When the content of MMA was 10% of resin, Cu²⁺ release rate at 15 ℃ was obviously higher than that at 10 ℃, which is very favorable for the temperature-controlled release of cuprous oxide.