The optimal condition for minimal agglomeration of barium titanyl oxalate tetrahydrate, the precipitate on preparing barium titanate by oxalate process, was investigated. Burette-dropping and dual-nozzle-spraying were used as adding methods. pH of washing water for precipitates was changed, and sodium pyrophosphate solution, methanol, ethoanol, and acetone were used as washing agents for precipitates, as well as distilled water. Drying temperature was changed from $50^{circ}C$ to $120^{circ}C$. Spraying, methanol-washing, and drying at $60^{circ}C$ showed the most dispersed distribution, Below $70^{circ}C$, the crystalline phases were observed.