Barium titanate product of electronic level was prepared with oxygen titanium sulfate（TiOSO4）which was the intermediate product in the production process of titanium white industry.Specific preparation process was as follows：titanium acid was obtained from TiOSO4 by hydrolysis at room temperature，then oxalic acid dissolved titanium acid，oxalic acid oxygen titanate was reacted with barium chloride，and the oxalic acid oxygen barium titanate was obtained.Then barium titanate product of electronic level was prepared after high temperature calcination.The optimum preparation conditions were as follows: titanium hydrolysis liquid pH was at 2.5~3.5，temperatures of oxalic acid oxygen titanate preparation and oxalic acid oxygen barium titanate precipitation were both at 50~70 ℃，coprecipitation pH was 2.5，calcination temperature was 800 ℃， and calcination time was 2 h.Analysis results showed that taking industrial titanium liquid as titanium source to produce ba-rium titanate was significantly lower than the cost of metatitanic acid.