We have studied the sintering of BaTiO3 nanopowders with various morphologies and crystallinities . During the ceramic sintering process, intrinsic grain growth rates are different along crystalline planes. The cubic morphology with high crystallinity, low defect concentration and low energy exposed surfaces constrains the grain growth and densification process of the as formed green body.Spherical particles with small curvature radius and low crystallinity have large sintering driving force. For such particles, material transport occurs in all directions thus leading to perfect grain boundary. The resulting ceramics presents a largest shrinkage and the highest rate of densi-fication of the ceramic at the micro-scale. The understanding of the morphology tuned sintering of BaTiO3 ceramics can be applied on the fabrication of BaTiO3 transparent ferroelectric ceramics in the future.