The invention discloses a simulation test apparatus for persulfate hot-steam activated advanced oxidation ex-situ restoration of contaminated soil and a simulation test method thereof. The apparatus comprises a liquid reagent conveying unit, a steam generating and conveying unit and a multifunctional crushing, stirring and sprinkling unit and a matched enclosed stirring container unit thereof, wherein the multifunctional crushing, stirring and sprinkling unit comprises a hollow crushing and mixing shaft provided with a plurality of hammer type blades and sprinkling holes, and a liquid reagent and steam pass through the crushing and mixing shaft. The method comprises the following steps: preparation of a persulfate solution; preparation of hot steam; addition of soil; preliminary crushing and mixing; sprinkling of the persulfate solution; injection of the hot steam; up-and-down separation of a container; analysis of soil properties and sample acquisition; and data analysis. According to the invention, full mixing of the persulfate solution with contaminated soil is realized under the condition of low soil moisture content; and as steam is injected into soil for heating so as to realize activation of persulfate, restoration effects of activated persulfate on organic pollutants in soil are simulated.