The invention relates to inflammation inhibition compound shown in a following formula (7). R1 to R3 are respectively and independently chosen from H, halogen, C1 to C6 alkyl, halogenated C1 to C6 alkyl, C1 to C6 alkoxy or halogenated C1 to C6 alkoxy. The compound has an obvious inflammation inhibition effect and has a good research prospect and application potential in the field of medicine. Theinvention further provides a preparation method of the compound. According to the preparation method, raw materials which are simple and easy to obtain are utilized as reactants, and the compound canbe prepared through three-step reaction; thus, the compound has a good application prospect and research value.