This study investigated the ultra-thin low-aluminum touch screen produced by the float process, analyzed the effects of air-side silicon coating and the average particle sized of the SiO₂ colloidal particles in the coating solution on the chemical tempering warpage value of glass. At the same time, the effects of co-solvent, water consumption and reaction time were studied by controlling variables on the particle size of SiO₂ colliods. The results showed that the coating of the air side of the glass can reduce the chemical tempering warpage value, the SiO₂ particle size in the coating solution had a linear relationship with the chemical tempering warpage value, and the difference between the predictive value and actual value were 0.59% to 0.63%. Keeping other conditions unchanged, increased the chain length of the alcohol solvent and prolonged the reaction time can increase the SiO₂ particle size, while reduced the water consumption can decrease the SiO₂ particle size. Therefore, by regulating the particle size of SiO₂ in the coating solution, the warpage value of chemical tempered ultra-thin float glass can be effectively predicted and controlled.