Objective To determine the biomechanical properties of two kinds of artificial heart prostheses (made in France (InterGard) and made in Suzhou, respectively) and provide theoretic reference for its manufacture and clinical use. Method Tensile strength, stress-strain relationship, stress relaxation and creep of these specimens were tested by using a material testing machine and analyzed the results.R esult The specimens made in France are superior in its properties compared with that of the specimens made in Suzhou.C onclusion Biomechanical properties of artificial heart prostheses mainly depend on the the material it is made of and the factures such as its stuff, structure, etc.