This paper research on how hazardous chemicals transportation provider optimal transportation solution supposed transportation risk (i.e. releasing of chlorine) may happen in the process of transportation. If the government attaches much importance to environment protection and pushes severe punishment on environment pollution, the hazardous chemicals transportation provider should consider two goals together: minimizing the individual transportation cost and minimizing the social transportation cost. Then this paper develops a goal programming model which contains two goals for the problem. Which goal is important will affect the objective function of this model. Through discussion on importance compare of two goals, this paper believes that government policy is very important to inspirit hazardous chemicals transportation providers complying with laws and protecting environment.