Abstract: We analyzed the effect of pH value on the properties of reaction products between CTS-Ag and acid dyes in order to optimize the processes of antibacterial dyeing veneers and reveal the color fixation mechanism of CTS-Ag. The chromatic aberration, water fastness, light fastness, and antibacterial property of antibacterial dyed veneers with various processes were measured. The results showed that: an acid-base neutralization reaction occurred between CTS-Ag and acid dyes under acid condition, and the lower pH value,the higher value of dye uptake rate and better fixing effect. Chromatic aberration value between CTS-Ag-treated antibacterial dyed veneer (ADV) and untreated ADV ranked as: ADV pretreated with CTS-Ag (Process B)＞combined treated ADV (Process C)＞post-treated with CTS-Ag (Process A). For water fastness, the order was Process C＞Process A＞Process B. However, Process A presented a poorer light fastness, while Process B and Process C improved light fastness. For antibacterial and antifungal properties, the order was Process A＞Process C＞Process B.