The invention belongs to the field of daily chemical articles, and discloses a pure natural liquid handmade soap. The pure natural liquid handmade soap is prepared by the following steps of mixing natural grease component, potassium hydroxide and pure water according to a certain ratio; performing saponification; after saponification is matured, sequentially adding a certain ratio of moisturizing component and easing component. The pure natural liquid handmade soap is prepared from the following raw materials in percentage by weight: 60 to 70% of the natural grease component, 4 to 4.5% of the potassium hydroxide and 30 to 36% of the pure water; 5 to 10% of the moisturizing component and 5 to 10% of the easing component are added into the soap liquid after the saponification is matured. The invention also discloses a preparation method of the pure natural liquid handmade soap. The pure natural liquid handmade soap prepared by the preparation method has the advantages that the components are natural, the property is mild, the pH (potential of hydrogen) is weak acid, the washing ability is strong, the health and environment-protection functions are realized, and the handmade soap is suitable for all kinds of skin, and is especially suitable for dry skin and sensitive skin.