Safe production method of lithium difluorophosphate

The invention provides a safe production method of lithium difluorophosphate. The safe production method comprises the following steps: S10, removing water vapor in a material mixing unit; s11, the storage barrel is opened for feeding, a vibrator is opened for vibration feeding in the feeding process, meanwhile, a distance sensor is opened to obtain the height of the lithium hexafluorophosphate material, and feeding is stopped when the preset height is reached; s12, opening a lithium hexafluorophosphate feed port and a dimethyl carbonate feed port for feeding, and fully mixing; s13, automatically sampling through a sampling port and obtaining the concentration of the lithium hexafluorophosphate solution; and S14, accurately feeding the lithium hexafluorophosphate solution through a flow sensor to enable the lithium hexafluorophosphate solution to fully react with aluminum oxide in the reaction tank, then introducing into a filter-pressing redissolving tank for filter-pressing and redissolving to form a lithiu