Abstract: Closed-loop supply chain based on third-party take back model(TPT-CLSC)is the key issue on business area.This paper develops a model of non-cooperation and cooperation model in TPT-CLSC system,and researches their pricing strategies.Research shows that the higher level of cooperation among TPT-CLSC members,the greater profits in TPT-CLSC channels.In order to facilitate the effective cooperation among TPT-CLSC members,the paper further establishes the mechanisms of coordination between members of the system,which increase their profits than non-cooperation.In the end,this paper proved the feasibility of cooperation system through numerical analysis.

Key words: TPT-CLSC, cooperation, coordination system