To provide a manufacturing method for positive electrode materials for a secondary battery which is especially used appropriately as a positive pole material for the secondary battery which achieves a low internal resistance and exhibits a narrow range variation of grain diameters and grain degree distributions between manufacturing lots in manufacturing processes at low costs and easiness, and provide a secondary battery having high capacity and outputting discharge voltages equivalent to conventional lithium secondary batteries.

In the manufacturing method, lithium compounds, divalent metallic compounds (but, metals containing the metallic compounds are Fe, Mn, Ni, Zn and Co) and phosphate compounds are mixed in a hermetic container together with a polarity solvent and an inert gas, and when bring the compounds into reaction within a temperature range not less than 100°C and not more than 250°C, the conductive fine grains are mixed into the liquid of the reaction.