The present invention provides dihydro-feruloyl-5-methoxytyramine, which can be used as antioxidant. The present invention also provides a method for preparing dihydro-feruloyl-5-methoxytyramine by monitoring activity of scavenging free radicals of dihydro-feruloyl-5-methoxytyramine本發明提供二氫阿魏醯5-甲氧酪胺,其係可用以抗氧化之化合物,並提供二氫阿魏醯5-甲氧酪胺之製法,且藉二氫阿魏醯5-甲氧酪胺發揮清除自由基功效。當中,也提出了它的活性測試方法。