The material of satellite rocket connecting belt is TB2 titanium alloy, which has strict requirements on surface quality. A novel method of electrochemical – electrochemical mechanical polishing of TB2 titanium alloy was proposed, the thickness of adhesive layer of TiCl₄ near workpiece surface is controlled by mechanical action. A tool with consolidated abrasive was designed and a electrochemical mechanical polishing system was established. Experiments were carried out to investigate the effects of different combination modes of electrochemical polishing and electrochemical mechanical polishing on surface quality, and the influences of typical process parameters such as voltage, tool rotation speed and feed rate on surface quality. Finally, under the conditions of machining voltage 25 V, tool rotation speed 100 r/min and tool feed speed 30 mm/min, a smooth surface with surface roughness R_a0.031 μm and S_a0.082 μm was obtained after alternating electropolishing and electrochemical mechanical polishing for 15 times. The continuous polishing of TB2 titanium alloy sheet parts was realized.