A preparation method for a medical porous tantalum implant material, comprising using tantalum powder and a solution prepared with an organic adhesive agent and a dispersant agent to produce a tantalum powder slurry, casting the slurry into an organic foamed body, keeping immersed till the pores of the organic foamed body are filled completely with the tantalum powder slurry, drying to remove the dispersant agent in the organic foamed body into which the tantalum powder slurry is cast, performing a degreasing process to remove the organic adhesive agent and the organic foamed body within an inert gas protective atmosphere, sintering within a vacuum to produce a porous sintered body, cooling, vacuum-annealing, and performing conventional post-processing to produce the porous tantalum the sintering step comprises: within a vacuum degree of 10-4 to 10-3 Pa, increasing the temperature to 1500 to 1800°C at a speed of 10 to 20°C/min, maintaining the temperature for 120 to 240 minutes, cooling together with the furnace to 200 to 300°C, increasing the temperature to 1500 to 1800°C at a speed of 10 to 20°C/min, maintaining the temperature for 180 to 240 minutes, increasing the temperature to 2000 to 2200°C at a speed of 5 to 10°C/min, and maintaining the temperature for 120 to 360 minutes. The porous tantalum material prepared using the present invention has good biocompatibility, safety, and highly strong mechanic properties, and is very suitable for bone tissue replacement of human weight-bearing parts.Procédé de préparation dun matériau pour implant médical au tantale poreux comprenant les étapes de : versement de la préparation dune solution de liant organique et dun agent dispersant avec de la poudre de tantale obtenue à partir dune suspension de poudre de tantale dans un corps mousseux organique trempage des pores du corps mousseux organique remplis de suspension de poudre de tantale séchage en vue du retrait de la suspension de poudre de tantale de lagent dispersant d
