Abstract: In order to support the active manufacturing and benefit both sides of the service trade for cloud manufacturing environment,an active rent-seeking method based on biding mechanism was raised for cloud services.Users' demand for manufacturing was broken up into several subtasks which would be published through bid documents.Cloud services decided to tender or not according to themselves and bid documents.An independent evaluator would evaluate the tender book and consider the recommending evaluations from other services comprehensively,and then seek the winning-bid one.Through a rent column,services with bad quality also had chance to be applied.Based on biding mechanism,the active rent-seeking model and the corresponding algorithm were also presented.Finally the simulation experiment was designed and carried out.The results showed that the active rent-seeking method was valid.