A 3D printing manufacturing method of a pure titanium dental crown comprises the five steps of mold taking and modeling, 3D cutting, 3D mold drilling, surface treatment and gluing, and manufacturing of the pure titanium dental crown is completed. The dental crown is made of a pure titanium material, and the mechanical property and plasticity of titanium are utilized, so that the service life of the dental crown is prolonged, and the comfort of a patient in daily use of the dental crown is improved. The method is different from 3D printing in a layer-by-layer stacking form of additive manufacturing in the prior art, a three-axis displacement system of 3D printing is utilized, firstly, a pure titanium material is subjected to 3D cutting and polishing, so that the external structure of the material meets the use requirement of the oral cavity of a patient, then, the polished material is subjected to 3D mold drilling, and an internal recess required by dental crown installation is machined; and the 3D scanning technology and the 3D modeling technology are utilized in the cutting, polishing and mold drilling processes, the dental crown manufacturing precision and manufacturing efficiency are improved, and the defects that in the prior art, dental crown manufacturing time is long, manufacturing precision is low, and the service life is short are overcome.