Abstract: BaTiO₃ based powder with co-dopants were prepared by citrate sol-gel process. The influence of the gelatin calcinations on nano-powders was investigated. It′s found that the optimized temperature for calcining 600℃ and 1 h heat preservation are more appropriate for calcining dried gelatin. And such prepared BaTiO₃ based powders after twice doping and grinding have smaller grain size of about 20-70nm and disperse well.