The invention discloses a fireproof floor and a manufacturing method thereof. The components, calculated by volume, of the fireproof floor comprise 10 parts of an inorganic adhesive material, 20-200 parts of a gelatinizing agent, 1-400 parts of epoxy resin powder and 10 parts of saw dust. The granularity of the epoxy resin powder is larger than 20 meshes, and the granularity of the saw dust is larger than 10 meshes. The manufacturing method thereof comprises the following steps of material mixing, plate blank pressing, plate blank solidifying, fireproof floor forming, male and female port machining, dust removing, film pasting or lacquer brushing; the inorganic adhesive material, the gelatinizing agent, the epoxy resin powder and a small quantity of the saw dust are utilized, mixed and pressed according to a certain proportion to form the floor; and the inorganic adhesive material and the gelatinizing agent cannot generate formaldehyde, environment pollution is avoided, the finished floor product is high in strength and can be laid through cement, the demand for the flatness of the ground where the floor is planned to be laid is not high, construction is convenient, and the saw dust has an effect of reducing the weight, per unit volume, of the floor and also has the effects of warmth keeping and sound wave absorption.