Objective: To observe the curative effect ofultrasound guided percutaneous alcohol sclerotherapy in treating ovarian chocolate cyst. Methods: 60 cases ofovarian chocolate cyst were treated by ultrasound guidedand washing with ethanol. Results: 60 cases of patients with interventional therapy were successful. The folow-up was Ia,disposable cure rate is 93%, effective rate was 100%.Conclusion: ultrasound guided interventional ethanolwashing treatment in chocolate cyst of good curative effect,can be used as the first method of treatment in chocolate cyst.