Abstract: The ECC material exhibit high ductility under tensile load and are frequently used as substitute of concrete. After reviewing the current research on the existing ECC constitutive model, this paper utilized the nonlinear finite element platform OpenSees and conduct secondary development on the established algorithm. Using the software to simulate the behavior of the ECC continuous beam model, comparison is made between the simulation results and the experimental results. Furthermore, this paper derives the sensitivity algorithm for ECC material parameters based on the DDM. The DDM calculation results is compared with the FDM results, which further verified the superiority of DDM. This paper also present the simulation results of the continuous beam as a case study to demonstrate the importance of sensitivity analysis.