The present invention relates to a dried tofu and a method for preparing the dried tofu, and more specifically, nutrition by using a gardenia tree extract that can improve preservation when preparing dried tofu, and using a spinach hot water extract capable of enhancing iron content. It relates to dry tofu with improved chemical and commercial properties and a method of manufacturing the same. Dried tofu manufactured according to the method of manufacturing dried tofu of the present invention is superior to general tofu in terms of nutrition by strengthening iron content by adding hot water extract of spinach, and using the hot water extract of gardenia tree, which is a natural material, is used to improve the shelf life of tofu. It is a very useful invention in the food industry because it can improve marketability by dramatically improving it.