The invention provides a natural plant manual cold-made soap, which comprises the following raw materials by mass: 192-200 parts of natural vegetable oil, 72-85 parts of an aqueous phase substance, and 29-30 parts of sodium hydroxide, wherein the natural vegetable oil comprises a plurality of materials selected from olive oil , coconut oil, palm oil, white oil, shea butter, canola oil, sweet almond oil, grape seed oil, rice bran oil, nut oil, castor oil, jojoba oil and avocado oil, and the aqueous phase substance is one or a plurality of materials selected from water, milk, potato clear juice,cucumber juice, carrot juice, goat milk, ginger, beer, apple juice, green tea and shea juice. The present invention further relates to a preparation method of the cold-made soap. According to the present invention, the natural vegetable oil and various food materials are used, such that the raw materials are simple, the ingredients are natural, the preparation process is simple, and the conditionis mild; and by combining various vegetable oils, the nutrients of the raw materials are effectively retained, the strong foaming capacity is achieved, and the obtained cold-made soap is mild and clean, does not hurt the skin, and is environmentally friendly.