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Abstract Objective To study the mechanical，chemical properties and biological evaluation of a polyamide material used for selective laser sintering(SLS) 3D printing of cutting guide.Methods Mechanical study included elongation at break，tensile modulus，tensile strength，vicat softening temperature，load deformation temperature and wearing.Chemical study included reducing substances，pH，heavy metals，evaporation residue and UV-absorption. Biological evaluation included vitro cytotoxicity test，skin sensitization test and intracutaneous reactivity test.The mechanical, chemical properties and biocompatibility were tested，and the results were evaluated.Results Mechanical Property：elongation at break 7.8%~22.3%，tensile modulus 1 664~1 982 MPa，tensile strength 47.71~51.25 MPa，vicat softening temperature 163.2~166.0 ℃，load deformation temperature 66.2~75.2 ℃，and wearing 6.8~16.8 mg.Chemical Property：complied with GB193352003.Biological Evaluation：no potential toxicity to vitro cells，no skin sensitization，and no intracutaneous reactivity.Conclusion The polyamide material has good mechanical，chemical properties and biocompatibility，which can be used to manufacture surgical 3D print cutting guide.
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