The analysis of the static load creep tests to asphalt mixture under 40 ℃, 200 kPa and 40 ℃, 50 kPa, indicated that the traditional machine model of asphalt mixture can not decribe the ＂consolidation effect＂and ＂flow damage＇at the same time. The accuracy of the existing experienced model of asphalt mixture is not high. Therefore, based on Levenberg-Marqurdt and global optimization theory, one kind of optimized experienced asphalt mixture creep constitutive model is proposed and solved by 1Stop software. The model is verified to overcome the shortcoming that the traditional machine model description extensibility is not good and the commonly used experinced model precision is not high.