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For the precision preparation of complex shape of pure titanium,powder injection molding technology was used.Several different powders were used to prepare defatted type feeding.Then they were burned into products after powder injection molding.The effect of sintering process parameters on sintering density, carbon and oxygen content, microstructure and mechanical properties was studied.The result shows that P3 sample has a better comprehensive performance .The density of P3 reaches 96.7% after 2h vaccum sintering under 1250 _oC.the content of C and O is respectively 0. 14% and 0. 46%, the tensile strength is 968 MPa, the bending strength is 1141MPa, the tensile strength is 720 MPa and the elongation is 4.5%. It possesses uniform small grain size and presents ductile fracture characteristics.