An industrial production process of tenofovir, the production process steps are as follows: add R-1,2-propylene glycol, diethyl carbonate and sodium ethylate into the reaction kettle; add absolute ethanol and diphosphite Ethyl ester, stirring, after the stirring is completed, put in paraformaldehyde and triethylamine, after the reaction is complete, add anhydrous sodium sulfate, dry, filter, and distill out, the distilled product is diethyl p-toluenesulfonyloxymethylphosphonate Fine product; add adenine, R-propylene carbonate, DMF and NaOH in the reaction kettle, after the reaction is complete, add magnesium tert-butoxide, drop diethyl p-toluenesulfonyl phosphate, after the reaction is complete, add acetic acid, Concentrate under reduced pressure, add hydrochloric acid, filter, filter out the solid and dry under normal pressure to obtain PMPA fine product. The method has the advantages of high yield, high product purity and low impurity content, and can be fully industrialized.