Abstract: High solid content slurry was prepared by ball-milling and staleness and then by secondary ball-milling with arc evaporated ITO powdes with average grain-size of 50 nm added 1.2% polycarbonate dispersant. Then high-density green body was prepared by stress-casting and the relationship betweem solid content and viscosities was studied, so was the relationship between green-body's density and solid content in connection with staling time of slurry. The relation of density of green body and target was spotlighted by different density green-bodies sintered at 1 530℃ in low-oxygen air atmosphere. The result showed that the target of 98.3% relative density whose superficial color was black was capable of being prepared by sintering the ITO green body whose relative density was 75% in 1 530℃ in low-oxygen air atmosphere, which demonstrated that the density of this black target was much higher than those of other ones from green-bodies of lower densities.