The invention belongs to the technical field of paper manufacturing, and provides a formula and a preparation method of paper for children. The formula of paper for children includes the following components in parts by weight: 500-800 parts of water, 100-200 parts of kaolin, 400-500 parts of ground calcium carbonate, 150-250 parts of light calcium carbonate, 3-4 parts of carboxymethyl cellulose,20-50 parts of starch, 150-250 parts of styrene-butadiene latex, 10-12 parts of a lubricant, 15-20 parts of a water repellent agent, 8-10 parts of titanium dioxide, 1-2 parts of a defoaming agent, 1-5parts of caustic soda and 0.1-0.2 part of a penetrating agent. The paper for children has the beneficial effects that 1, the paper for children is environment-friendly, non-toxic and degradable; 2, the color rendition degree is high, the ink consumption is reduced, and the printing cost is low; 3, eyesight is protected, light source reflection is low, and fluorescence is avoided; and 4, the paperis suitable for OID printing paper.