Based on scaling and nonlinear-fitting methods, the material properties of the 3-year old pediatric cervical spine were acquired． A specific scaling method for the mechanical properties of the pediatric cervical ligaments was proposed, and the C4-C5 cervical segment finite element model for the 3-year old child was developed with accurate geometries and anatomical structures and validated under quasi-static and dynamic tensile loading.It was indicated that the simulation responses were consistent with those of experiments, with an quasi-static tensile stiffness of 211.8 N/mm, a dynamic tensile ultimate failure force of 759.9 N and an ultimate failure displacement of 5.083 mm in simulations.In addition, the force-displacement curve in the dynamic tensile simulation was also similar to that of the experiment.It can be concluded that this model is able to reflect the quasi-static and dynamic tensile mechanical properties of 3-year old pediatric C4-C5 cervical segment with higher biofidelity.