Abstract: In order to obtain the optimal range of process parameters for abrasive belt grinding of titanium alloy surface roughness within a given range, titanium alloy TC4 was used as the research object to conduct abrasive belt grinding surface roughness tests. The empirical formula of grinding titanium alloy surface roughness was established, analyzed the sensitivity of the surface roughness to the process parameters, and obtained the stable and non-stable regions of the process parameters. Based on the range analysis of the orthogonal experiment, the influence curve of the process parameters on the surface roughness was obtained, and the interval optimization of the process parameters was carried out. The research results showed that the surface roughness is the most sensitive to changes in abrasive grain size, and the least sensitive to changes in abrasive belt linear velocity; the preferred range of abrasive grain size is 120#~150#, and the preferred range of abrasive belt linear velocity is 15~20 m/s, the preferable range of grinding pressure is 10~15 N. The theoretical method and experimental basis for the surface roughness control of titanium alloy grinding with abrasive belts are provided.