Non-aqueous electrolyte solution for secondary battery, method for producing same, and secondary battery provided with same

The purpose of the present invention is to provide: a non-aqueous electrolyte solution for a secondary battery, which can suppress the occurrence of bubbles; a secondary battery that includes same; and a method for producing a non-aqueous electrolyte solution for a secondary battery, in which a bubble degassing step is omitted and which exhibits improved production efficiency. This non-aqueous electrolyte solution for a secondary battery contains: component (A) which is at least one type of phosphoric acid diester salt represented by general formula (1), and which does not contain a halogen atom; and component (B) which is at least one type of compound selected from among the group consisting of a boron complex salt represented by general formula (2) and/or a boric acid ester, an acid anhydride, a cyclic carbonate having an unsaturated bond, a cyclic carbonate having a halogen atom, a cyclic sulfonic acid ester, an amine compound having an acetoacetyl group represented by general formula (3), and a phosphorus compound represented by any one of general formulae (4) to (7).