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Porous Ti-6Mo alloy was prepared from mixed powders of Ti, Mo and binder by selective laser sintering, and the structural characteristics and mechanical properties were investigated. The results show that the pore features are connected with the sintering process. As the sintering temperature rises from 1000 to 1200 ℃, the pore morphology changes gradually from interconnected to isolated pores, and the porosity level reduces from 58% to 24%, as well as the pore size from 112 to 43 μm. The porous alloy exhibits a laminar microstructure composed of dominant α and minor β phases together with trace amounts of α-Ti precipitations at room temperature. The compressive stress-strain curves consist of elastic deformation, plastic yield and fracture stage. The elastic modulus and yield strength increase respectively in the ranges 2.07-11.9 GPa and 31.4-152.8 MPa with the decrease in porosity, meanwhile the relationship between the relative mechanical properties and relative density is found to obey a power law relation. Porous Ti-6Mo alloy may be a feasible biomaterial based on the fact that both porous structure and mechanical properties can achieve the requirement of natural bones.