The invention belongs to the technical field of biomedical engineering, and specifically relates to a passive middle ear implantation device and a preparation method thereof. The preparation method steps are as follows: uniformly mix pure titanium powder and a binder and granulate, and perform injection molding treatment to obtain an injection Then carry out water debonding, drying, thermal debonding and pre-sintering treatment in sequence; then carry out sintering treatment and post-treatment, and finally obtain the passive middle ear implant device. The method adopts the Micro MIM process, and has made adjustments and improvements in the preparation of fine pure titanium powder injection materials, mold-assisted filling design, debonding process, and sintering process. The prepared passive middle ear implant has bone conduction and metal titanium Excellent mechanical properties, corrosion resistance, and biocompatibility, as well as strength, toughness, elastic modulus, and fatigue resistance that match human bone tissue, can overcome the high cost and low efficiency of existing technologies.