The invention discloses a preparation method of near-spherical titanium powder, and belongs to the technical field of 3D printing material preparation. In order to solve the technical problems of highcost, complex process and low yield in preparation of spherical titanium powder in the prior art, the invention provides a preparation method of near-spherical titanium powder, which comprises the following steps: uniformly mixing titanium dioxide with an additive, and pressing into a prefabricated material; carrying out reduction reaction in a closed reaction container to obtain a reduction material; crushing, acid leaching, washing and drying the reducing material to obtain metal titanium powder with irregular shapes; and finally, carrying out the shaping treatment in a jet mill to obtain the nearly spherical titanium powder. Compared with the traditional preparation process of the spherical titanium powder, the method has the advantages of low equipment requirement, greatly reduced cost, nearly spherical titanium powder, low oxygen content and the like.