Among translators there has been a lengthy dispute about literal translation and free translation and we find it hard to say which is preferable,because,depending on the context,each has its merits and defects.In fact,the two methods are both necessary.Sometimes we should use the method of literal translation,sometimes of free translation.Of course when the method of lteral translation is applicable,it should be used to the fullest extent.All these above will be presented through several case analyses from the experts of American Sucker.