Objective To test the biomechanical properties and evaluate the feasibility of the new developed external fixator system,so as to provide reliable theoretical basis for further clinical research.Methods The tibia of 10 fresh male cadaver were made into fracture model.In order to fix the fracture of tibia,experimental group were treated with the new developed external fixator system and the control group were treated with the Hoffman 2 external fixator which was used in clinic commonly.Then axial compression and horizontal torsion test were made on tibia fracture model.The test results were recorded and statistically analyzed.Results There was no statistical difference on the aspect of the ability to resist axial compression and horizontal torsion between the experimental group and the control group(P >0.05). The new developed external fixator system could meet the criterion in clinical application.Conclusion The new developed external fixation system can meet the requirement of biomechanics on fixing the fracture of bone,and it can greatly simplify and diversify the clinical applica-tion of external fixation device.