The present invention relates to onion and olive dressing and a manufacturing method thereof. The onion and olive dressing according to the present invention is made by mixing mayonnaise, wasabi, onion, lemon, white sugar, fermented vinegar, and olive. The onion and olive dressing according to the present invention gives rich taste.본 발명은 어니언 올리브 드레싱 및 그 제조방법에 관한 것이다. 본 발명에 따른 어니언 올리브 드레싱은, 마요네즈, 와사비, 양파, 레몬, 백설탕, 환만 식초, 올리브를 혼합하여 이루어진 것을 특징으로 한다.