The invention provides a plutella xylostella sex attractant for plateau vegetable production regions. The plutella xylostella sex attractant is characterized in that it has a quaternary formula composed of Z11-16:Ald, Z11-16:OAc, Z11-16:OH and Z-3-hexenyl acetate in a ratio of 30:70:1:5, a single lure core has a total sex pheromone content of 106 micrograms. Research of the applicant finds that plutella xylostella has the difference of sex pheromone component, proportion and content in male moths caused by geographical populations. In order to improve the attraction ability of the plutella xylostella sex attractant, the applicant carries out regional plutella xylostella sex attractant formula screening and plant volatile synergistic test directed to plutella xylostella in plateau vegetable production regions. According to the ratio and specific concentration, the sex attractant has the advantages of low cost, high plutella xylostella attraction amount, environmental protection and high efficiency, and is suitable for promotion and application in plateau vegetable production regions.