The application discloses a preparation method of large-particle ternary precursors with high
sphericity and low tap density, and comprises the following steps: S1, N2 is introduced into a first reaction bottom solution, then ternary solution and adjusting solution are introduced into the first reaction bottom solution at the same time, one-stage reaction is carried out, and a first
slurry is obtained; S2, the flow rates of the ternary solution and the adjusting solution are adjusted, two-stage reaction is carried out, and a second
slurry is obtained; S3, the second
slurry is washed and dehydrated, and a
crystal seed is obtained; S4, N2 is introduced into a second reaction bottom solution, then the
crystal seed is added, and heating and stirring are carried out, so that a
crystal seed mixture is obtained; S5, the ternary solution and the adjusting solution are introduced into the crystal
seed mixture, and step-by-step stirring reaction is carried out, so that a slurry is obtained; and S6, the slurry is aged, washed, dehydrated and dried, so that the large-particle ternary precursors with high
sphericity and low tap density are obtained.