Lithium phosphate recovery process

The invention relates to the technical field of lithium phosphate recovery, and provides a lithium phosphate recovery process, which comprises the following steps: S1, a pretreatment module: carrying out precision filtration, pH regulation, adsorption hardness removal, adsorption organic matter removal and UF filtration on sewage in an initial regulation tank in sequence; s2, a lithium recovery module, wherein the pretreated liquid obtained in the step S1 is matched with sodium sulfate and a lithium phosphate solution to be subjected to separation treatment through an electrodialyzer to obtain a lithium sulfate solution, a diluted lithium phosphate solution, a sodium sulfate solution and a sodium phosphate solution; and S3, a phosphorus recovery module: carrying out nanofiltration filtration process treatment on the third produced water obtained in the step S2 to obtain fourth produced water and nanofiltration concentrated water, feeding the fourth produced water to the nanofiltration filtration process in th