The invention provides a method for obtaining an active ingredient kaempferol by hydrolysis from Taiwan native seed cinnamon, wherein the extraction step is divided into six steps. The process comprises the following steps: high-temperature extraction of the first solvent of the cinnamon seed of Taiwan native soil, and filtering to obtain an extract, and the extract is concentrated in vacuo to obtain a concentrated extract, and the concentrated extract is added to an acidic substance at 40 ° C. Hydrolysis at 60 ° C for 6 to 10 hours, after standing for 15.5 to 16.5 hours, adding a basic substance to neutralize, to obtain a hydrolyzate, filtering the hydrolyzate to wash the filter residue with a second solvent, and then concentrating it into an extract by vacuum. A hydrolyzate containing a kaempferol component is obtained.本發明提供一種由台灣原生種土肉桂經由水解方式得到活性成分山奈酚的方法，其中該萃取步驟係分為六步驟。其流程為將台灣原生種土肉桂碎片第一溶劑進行高溫萃取，過濾後得到一萃取液，並將該萃取液真空濃縮得到一濃縮萃取液，將濃縮萃取液加入一酸性物質，於40℃~60℃溫度下水解6~10小時，靜置15.5~16.5小時後，加入一鹼性物質中和，得到一水解液，過濾該水解液以第二溶劑洗下濾渣，隨後真空濃縮成浸膏，製得含有山奈酚成分之水解物。
