The invention belongs to the field of sodium dodecyl sulfate, and especially relates to a production method of sodium dodecyl sulfate. The sodium dodecyl sulfate production method is characterized in comprising the steps that: (1) sulfonation and neutralization are carried out, wherein a sulfonating agent is added into lauryl alcohol, such that a sulfate is produced through a sulfonation reaction; sulfate is subjected to a neutralization reaction with sodium hydroxide, such that liquid sodium dodecyl sulfate is produced; (2) concentration is carried out; (3) drying is carried out, wherein the concentrated solid material is dried, and a drying temperature is 40-100 DEG C; and (4) crushing, molding, and packaging are carried out, wherein the dried solid material is crushed, molded, and packaged, such that products are obtained. The method provided by the invention has the advantages that: with the method, a production process route of sodium dodecyl sulfate used in a conventional daily use material is broken through. The product purity is up to 97% or even higher than 99%. The product can be used in biological pharmacy and chemical reagent production.