A kind of castor-oil plant bush type culture method, ties up to plantation castor-oil plant Hou, and what castor-oil plant true leaf extracts its terminal bud when growing 4 ~ 6 leaf； The Shang Kou More of terminal bud to be extractd closes Hou once every two weeks and continuously three times, will dilute dwarfing agent spraying blade face and the perfusion soil of Hou； Wherein, dwarfing agent system is selected from a gram U.S. element, Bark element or benefit and receives one of which. 一種蓖麻矮化栽培方法，係在種植蓖麻後，於蓖麻真葉生長4~6葉時摘除其頂芽；待摘除頂芽之傷口癒合後以每兩週一次且連續三次，將稀釋後之矮化劑噴佈葉面及灌注土壤；其中，矮化劑係選自克美素、巴克素或益收其中一種。
