With　the　increasing　number　of　food　safety　problems　caused　by　the　abusing　and　misusing　of　plant　hormones,　it　will　be　increasingly　important　to　strengthen　the　trace　detection　of　plant　hormones　in　foods.　In　this　study,　benzyl　methacrylate-methyl　methacrylate-based　amphiphilic　polymer　micelles　were　prepared,　and　a　method　for　trace　determination　of　five　plant　hormones　was　established　by　using　these　micelles.　This　method　was　rapid,　sensitive　and　reproducible.　Through　optimization,　the　best　experimental　conditions　were　obtained　as　follows:　2　g/L　polymer　micelles,　50　mmol/L　NaOH-H3BO3　buffer　(　pH　9.　2),　15　kV　running　voltage.　Based　on　this　novel　method,　naphthalene　acetic　acid　in　the　solution　of　rooting　powder　was　determined.