The invention discloses a wet process phosphoric acid purification technology of nonphosphate precipitation and belongs to the field of phosphorus chemical industry. According to the wet process phosphoric acid purification technology of nonphosphate precipitation, an agent is combined with anions and cations in diluted phosphoric acid to generate an indissolvable double salt which is precipitated in a form of nonphosphate, so that a purpose of wet process phosphoric acid purification is achieved, thereby satisfying the demand of producing a high-concentration phosphate fertilizer, a water soluble fertilizer and an industrial phosphate product. The method can remove iron, magnesium, aluminum, arsenic, lead, sodium, potassium, sulfate radicals and the like stably in wet process phosphoric acid and has characteristics of being simple in reaction condition, short in a process flow, wide in an agent source, low in a treatment cost, high in a P2O5 recovery rate and the like, so that sesquioxide-removal, heavy metal removal and desulfuration by a one-step method are realized. The removal rates of iron, magnesium and aluminum in the treated wet process phosphoric acid separately reaches above 97%, 70% and 15%; arsenic and lead in diluted acid are less than 5 ppm; sodium (calculated by NaO) and potassium (calculated by K2O) are separately lower than 0.025% and 0.083%; sulfate radicals are lower than 0.16%; and the P2O5 recovery rate is higher than 98.5%.