The invention provides a manufacturing method with which lithium difluorophosphate powder can be recovered from a lithium difluorophosphate solution. A manufacturing method for lithium difluorophosphate powder, said method characterized by including a step in which solid lithium difluorophosphate is precipitated by adding a poor solvent to a solution in which lithium difluorophosphate is dissolved in a main solvent, and a step in which lithium difluorophosphate powder is obtained by solid-liquid separation of the solid lithium difluorophosphate from the liquid containing the main solvent and the poor solvent, wherein the relational expression between the octanol/water partition coefficient PP of the main solvent and the octanol/water partition coefficient PA of the poor solvent is defined by formula (1): PA >= -4/3 * PP + 1.2.