The invention discloses a method for simultaneously detecting phthalic acid esters (PAEs) environmental hormone and metabolite thereof in a water sample. The method comprises the following steps: gas chromatography-Fisher identification (GC-FI) analysis is performed on a reference substance and a liquid layer which is obtained by processing to obtain the peak areas of the PAEs environmental hormone and the metabolite thereof in the reference substance and the liquid layer respectively; according to the computational formula that the contents of the PAEs environmental hormone and the metabolite thereof in the to-be-detected water sample is equal to the quotient of the product of the peak areas of the PAEs environmental hormone and the metabolite thereof in the liquid layer and the concentration of the PAEs environmental hormone and the metabolite thereof in the reference substances and the peak areas of the PAEs environmental hormone and the metabolite thereof in the reference substance, so that the content of the PAEs environmental hormone and the metabolite thereof in the to-be-detected water sample is obtained. The method for simultaneously and quantitatively detecting the PAEs environmental hormone and the metabolite thereof in water environment has the advantages of high accuracy and high sensitivity.