The invention discloses a porous tantalum workpiece fiber weaving method. The method includes the steps that S1, a geometric model is built, and calculation is carried out; S2, tantalum foil strips are machined and formed; S3, fiber weaving is carried out to form layered structures formed by weaving the tantalum foil strips; S4, the obtained layered structures are stacked; S5, heating and pressurizing are carried out; S6, sintering is carried out, the structures are cooled to be room temperature, and a porous tantalum workpiece is obtained. According to the porous tantalum workpiece fiber weaving method, a net-shaped fiber thin layer is manufactured through two-dimensional fiber weaving by optimizing process parameters and precisely controlling the size of the tantalum foil thin strips. By means of stacking layer by layer, heating and pressurizing, biological porous tantalum is formed according to certain heating and sintering. The manufacturing method can be applied to the medical industry, solves the problems that environment pollution is caused when powder are stacked layer by layer and harmful residual matter are generated by other sintering methods and the vapor deposition method.