A preparation method for a medical porous metal implant material comprising mixing tantalum powder, a pore-forming agent, and a forming agent into a powder mixture, then granulating, injecting into a mold for forming, demolding, degreasing, sintering, and performing a heating process to produce the medical porous metal implant material for dental bone tissue replacement the pore-forming agent is one or multiple of sodium bicarbonate, urea, sodium chloride, methyl cellulose, and ethyl cellulose, and the forming agent is one or multiple of polyvinyl alcohol, stearic acid, zinc stearate, paraffin, and synthetic rubber the degreasing process comprises: gradually increasing the temperature to 400 to 800°C at a speed of 0.5 to 3°C/min, introducing argon gas to form a protective atmosphere, and maintaining the temperature for 60 to 240 minutes the heating process step comprises: within a vacuum degree of 10-4 to 10-3 Pa, increasing the temperature to 800 to 900°C at a speed of 10 to 20°C/min, maintaining the temperature for 240 to 480 minutes, cooling to 400°C at a speed of 2 to 5°C/min, maintaining the temperature for 120 to 300 minutes, and cooling together with the furnace to room temperature. The porous tantalum produced is very suitable as a medical implant material for dental bone tissue replacement.Procédé de préparation dun matériau métallique poreux pour implant médical, selon lequel la poudre de tantale est mélangée à un agent de formation de pores et un agent moulant pour obtenir une poudre synthétique granulée, qui sera ensuite injectée dans le moule en vue de son moulage, démoulée, frittée et traitée thermiquement de manière à obtenir un matériau métallique poreux de substitution de tissu osseux dentaire pour implant médical. Lagent de formation de pores représente un ou plusieurs parmi bicarbonate de sodium, urée, chlorure de sodium, métyhlcellulose, éthylcellulose et lagent moulant est un ou plusieurs parmi alcool polyvinylique, acide stéarique, stéarate de
