The invention discloses a glue-free bamboo shaving board and a preparation method thereof. The preparation method includes: subjecting bamboo shavings obtained by chipping and flaking bamboo and bamboo chips obtained by screening bamboo processing leftovers to drying, treating by applying treatment liquid obtained by mixing distilled bamboo vinegar and strong acid, airtight aging, high-temperaturesteaming, paving and hot pressing. By subjecting the bamboo shavings to treating with acidic treatment liquid, airtight aging and high-temperature steaming, ingredients like starch, sugar and tannincontained in the bamboo are activated; part of lignin is fused under action of the acidic treatment liquid in the process of hot pressing to form a gelatinous substance, and the glue-free shaving board is obtained by glue-free gluing under hydrothermal action during hot pressing. No adhesive is used in the process of production, and the glue-free bamboo shaving board is free of chemical substanceslike formaldehyde, thereby being an environment-friendly artificial board, and can be widely used as an indoor decorating material or for furniture manufacturing.