Collinear production method of positive electrode material

The invention belongs to the technical field of positive electrode materials, and particularly relates to a collinear production method of a positive electrode material. The invention provides a collinear production method of a positive electrode material, which comprises the following steps: placing a first positive electrode precursor material in a first sagger, placing a second positive electrode precursor material in a second sagger, stacking the first sagger and the second sagger from top to bottom, placing the first sagger and the second sagger in a roller furnace, and calcining to obtain the positive electrode material. Respectively obtaining a first positive electrode material and a second positive electrode material; the first positive electrode precursor material comprises manganous-manganic oxide or a nickel-cobalt-manganese ternary precursor; the second positive electrode precursor material comprises manganese dioxide. The positive electrode material with stable performance can be obtained through