The invention discloses attapulgite clay indoor decorative paint and a preparation method, and belongs to the technical field of paint. The paint is prepared from attapulgite clay, polyurethane, polyving akohol, graphene, calcium oxide, amargosite, shale diatom ooze, clove oil, tea tree essential oil, peppermint essential oil, a filling agent, a defoamer, a stabilizer and a plasticizer. The preparation method comprises the steps that polyurethane, polyving akohol, graphene and the plasticizer are weighed and placed in a reaction kettle, stirring is conducted by adding water, then modified attapulgite clay is added, and ultrasonic treatment is conducted after uniform stirring; the shale diatom ooze, calcium oxide, amargosite, the filling agent, the defoamer and the stabilizer are added for ultrasonic treatment, then the essential oil is added for reacting for 0.5-2 hours, and shearing is conducted for 10-20 min to obtain the paint. The paint has good waterproof and antiseptic effects and good bactericidal and antimould functions, and is safe, reliable, environmentally friendly and free of pollution, and the preparation method is simple and easy to implement and has good application value.