NOVELTY - The method involves subjecting a mixture of a negative-electrode active material (2) on which oil has been adsorbed, carboxymethyl cellulose (3) and water (4) to hard kneading to prepare a primary kneaded mixture (5), and diluting the primary kneaded mixture with water (4) to prepare a slurry (6). Binder (7) is added to the slurry to prepare a negative electrode paste (1). An amount of the oil that is adsorbed on the negative-electrode active material is defined to a value of 50 to 62 ml per 100 grams of the negative-electrode active material.    USE - Method for producing negative electrode paste used for producing non-aqueous electrolyte secondary battery (claimed), such as lithium-ion battery used in hybrid vehicle.    ADVANTAGE - A high degree of peeling strength can be ensured even when carboxymethyl cellulose with a high viscosity is used in the negative electrode. A lithium-ion battery with sufficient output characteristics and cycle characteristics can be provided. The carboxymethyl cellulose can be dissolved completely during the hard kneading and the number of defects in the negative electrode can be reduced.    DETAILED DESCRIPTION - The amount of the oil that is adsorbed on the negative-electrode active material is an amount at the time when the viscosity characteristics of the negative-electrode active material exhibits 70% of the maximum torque that is generated when the oil is titrated onto the negative-electrode active material. The 1% aqueous solution viscosity of the carboxymethyl cellulose is defined to a value of 6000 to 8000 milli-Pascals-second. An INDEPENDENT CLAIM is also included for a non-aqueous electrolyte secondary battery.    DESCRIPTION OF DRAWING(S) - The drawing is a schematic diagram that illustrates the flow of the production process of a negative electrode paste.    Negative electrode paste (1)    Negative-electrode active material (2)    Carboxymethyl cellulose (3)    Water (4)    Primary kneaded mixture (5)    Slurry (6)    Binder (7)