Abstract: Considering the unreasonable factors in conventional pricing business process, such as low level of information rate and automation and poor network, each and every step in the whole process of conventional pricing business was analyzed quantitatively by a method based on process algebra. Then the conventional process was reengineered in combination with the characteristics of pricing business process in electronic commerce circumstances, and the results of the two different processes were evaluated comparatively. Evaluation results showed that the pricing business process after reengineering can reduce the workload and mistakes, and quicken its response to relevant enterprises in electronic commerce.