Electron beam welding (EBW) of titanium alloy is widely used in aerospace field, since it has high quality in titanium ally welding. The residual height is low after welding while the heat affected zone of welding seam is small. But for some important aviation components, the residual height is still too high to meet the requirements. As a common finishing method for Aeroengine parts, abrasive belt grinding has unique advantages in the processing of difficult-to-machine materials such as titanium alloys. So in this paper, we use abrasive belt grinding to grind the electron beam weld of titanium alloy, which can improve the surface quality and prolong the service life of the parts. The grinding performance of abrasive belt grinding for electron beam welding seam of titanium alloy is studied through the basic grinding experiment of electron beam welding plate of titanium alloy in this paper. After grinding, the surface of the weld is smooth and the connection with the matrix is smooth. The residual height of the weld is less than 0.1 mm, and the roughness Ra of the weld after grinding can be less than 1.0 um, which meets the requirements of the parts. Experiments show that with the increase of belt speed, the quality of weld grinding is improved. With the increase of grinding pressure, the roughness of weld seam decreases and the quality of weld seam improves too. In addition, the surface quality of front of the weld is better than the back, and the machinability is higher after grinding. Therefore, the front of the weld is more suitable for working face. Experiments show that abrasive belt grinding has excellent machinability for electron beam weld of titanium alloy, and the machined surface meets the requirements of technology and use of parts.