Abstract: Abnormal uterine bleeding（AUB） is a femal common disease. Endometrial ablation（EA） is one of the treatments of AUB. EA could destroy the endometrium and the superficial layer of myometrium by physical or chemical methods. When the endometrium destroyed，it will lose the potential to regenerate，then the menstruation quantity become little，even amenorrhoea and excessive uterine bleeding is avoided. Up to now，there are two generations of EA. Each generation various ways destroy the endometrium to treat menorrhagia. Though endometrial ablation is more and more safe and effective，but it still has many deficiencies，such as postoperative bleeding，infection，even pregnancy. Also，menstrual related abdominal pain，such as hematometra，post-ablation-tubal sterilization syndrome（PATSS） and still exists the risk of endometrial malignant disease. There are EA related problems need further research and the summary of evidence-based medicine.

Key words: Hysteroscopy, Endometrium, Menorrhagia, Endometrial ablation