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For the design of pore structure of titanium alloy implants, most of the current researches were on positive Poisson"s ratio pore structures, while few of them were concerned with the design of negative Poisson "s ratio pore structures. Some samples of titanium alloy negative Poisson "s ratio pore structure implants with different deformation mechanisms and porosities were fabricated by selective laser melting(SLM), and microscopic material characterization was performed, and manufacturability evaluation was completed. Through the test of mechanical properties, the related mechanical data were obtained, which reveal the influence of mechanical properties such as strength and elastic modulus on cellular structure types and structural parameters through compression tests, and evaluates the matching degree of different structures with mechanical properties of human bone. The results show that: each structure has high manufacturability, and the forming quality is related to the structural characteristics and porosity; The mechanical performance of negative Poisson"s ratio structure highly depends on the structure design and porosity; The designed negative Poisson"s ratio structure can reduce the elastic modulus of solid metal to a range close to that of human bones by changing the diameter of the struts, which is expected to further achieve a wide-span regulation of the mechanical properties of the implant by adjusting the structural parameters.