The invention discloses a preparation method of a high-strength type floor leather material, and belongs to the field of ground materials. The preparation method comprises the following steps of: mixing mao bamboo fibers with deionized water to obtain a mixture I, ultrasonically dispersing the mixture I and pulping the mixture I to obtain paper pulp mixed liquor, and mixing the paper pulp mixed liquor with zinc nitrate by stirring to obtain a mixed solution; then performing water-bath heating on the mixed solution, urea and polyvinyl alcohol, and filtering to obtain a filter cake; washing and drying the filter cake to obtain modified fibers; adding nylon 66 and polyethylene glycol terephthalate into the modified fibers to obtain a mixture II; performing melting extrusion, cutting pelletizing, melt spinning and high-speed drafting on the mixture II, and uniformly spreading the mixture II onto a net forming machine to form a fiber net; splitting the fiber net and drying the fiber net to obtain a dried basic body fiber net; then mixing PUD-821 waterborne polyurethane, ammonium stearate and the like by stirring, standing and de-foaming to obtain de-foamed pulp, coating the two sides of the dried basic body fiber net with the de-foamed pulp, then standing and drying, thereby obtaining the high-strength floor leather material. The preparation method has the beneficial effects that: the high-strength type floor leather material has relatively high tensile breaking strength and hardness, and is worthy of being popularized and used.