The invention discloses a porous titanium material and a preparation method thereof. Discharge plasma sintering is performed on a test sample, pressure maintaining is performed after a sintering temperature is reached, unloading is performed after pressure maintaining is ended, and finally, the test sample is cooled to the room temperature along with a furnace, so that the porous titanium materialis obtained, wherein a sintering temperature ranges from 850 DEG C to 1350 DEG C and sintering pressure is 5-20 kN; the test sample comprises spherical pure titanium powder and a plurality of layersof pure titanium nets, and the spherical pure titanium powder is filled into grids of the pure titanium nets and gaps among the pure titanium nets. The porous titanium material prepared by the methodhas the characteristics of certain porosity, relatively uniform pore distribution and excellent mechanical property.