A diaryl ether for inhibiting breast cancer cells and a method of producing the same are disclosed. The diaryl ether compound has a structural formula (I) as follows:In the formula (I), R1 represents a hydrogen atom or a methyl group, R2 represents a hydrogen atom, an alkyl or alkenyl group having 1 to 6 carbon atoms, and the R1 and R2 are either the same or different.本發明是揭露一種雙苯基醚化合物,可專一性抑制乳癌細胞生長,其中此雙苯基醚化合物具有如式I之結構式:其中R1為氫原子或甲基,R2為氫原子或碳數1至6之烷基或烯基,且R1與R2為相同或不同。