In this paper,a sol-gel method is used to prepare a wear-resistant coating with high light transmittance applied to the surface of PMMA coated plate.The dosage ratio of MTES to TEOS,the particle size and dosage of silica sol,the dosage of nano-ZnO and the reaction conditions of the sol were studied.The results showed that when the mass ratio of MTES to TEOS was 5:1,the particle size of the alkaline silica sol was 12~15 nm,the addition amount was 30%,the reaction temperature was controlled at about 78 ℃,and the reaction time was two hours,a certain amount could be prepared.By adding 4% nano-ZnO,the transmittance of the coating can be further improved.