PURPOSE: A composition containing Nelumbo nucifera root extract for preventing and treating abdominal obesity or fatty liver is provided to reduce fat in abdomen and liver tissues and to enhance antioxidation effect. CONSTITUTION: A composition for preventing and treating abnominal obesity or fatty liver contains Nelumbo nucifera root extract as an active ingredient. A health food for preventing and treating abdominal obesity or fatty liver contains Nelumbo nucifera root extract as an active ingredient. A method for preparing Nelumbo nucifera root extract comprises: a step of collecting and washing Nelumbo nucifera root; a step of isolating with water, alcohol, or mixture thereof; a step of filtering the extract; and a step of compressing/concentrating and freeze-drying.본 발명은 연근 추출물을 함유하는 복부비만 또는 지방간의 예방 및 치료용 조성물에 관한 것으로서, 보다 상세하게는 물, 알코올 또는 이들의 혼합물을 용매로 하여 추출된 연근 추출물을 복부비만 또는 지방간의 예방 및 치료용 조성물에 관한 것이다.