The work aims to develop the functional diatomite decorative paper with humidity control and antibacterial performance based on the previous research results. With diatomite as the raw material, the diatomite decorative paper with humidity control, antibacterial performance and on-site personalized printing was prepared by traditional coating process. Diatomite decorative paper was suitable for printing with water-based ink. With strong coverage, uniform density and lower color difference, it could be printed on site upon request of customers, thus realizing private customization. Diatomite decorative paper had a good humidity control function. By controlling the coating amount, the moisture absorption and desorption rates of diatomite decorative paper were both above 15%. The decorative paper could be endowed with good antibacterial performance by loading antibacterial agent, and the antibacterial circle could reach over 23 mm. The diatomite decorative paper developed can be used not only for home decoration, but also for packaging and can be customized privately. Featured by personality, convenience, lower consumption and lower price, diatomite decorative paper is a kind of decorative packaging material with good application prospect.