The invention discloses a method for separating out and purifying epoxypropane and methyl alcohol. The method comprises the following steps: 1) rectifying washing mother liquor which contains the epoxypropane and methyl alcohol and is used for producing aliphatic polycarbonate in a first rectifying tower so as to obtain tower top material containing crude epoxypropane from the tower top of the first rectifying tower and obtain the methyl alcohol from a tower plate at the tower kettle side line of the first rectifying tower; and 2) rectifying the tower top material containing the crude epoxypropane in a second rectifying tower so as to obtain the epoxypropane from the tower plate of the tower kettle or tower kettle side line of the second rectifying tower. In the invention, a double-tower efficient rectification mode is adopted, namely, vacuum or normal pressure rectification is used in the first tower, and high pressure rectification is used in the second tower, thereby extremely effectively separating out two target substances epoxypropane and methyl alcohol, obtaining high-purity epoxypropane and methyl alcohol materials, reducing by-products and fully utilizing material energy,and the industrial process reaches the requirement of green chemistry.