The panel listened to the company research group about Φ level 6 to 7 m composite shield main bearing development report and the user to the main bearing production supervision report. On the site they visit the main bearing production and examination situation , and discuss the shield main bearing factory and subsequent usage. Through inquiry and discussion, the panel agreed that The precision of the bearing components and finished products meet the design requirements, the technical indicators are superior to the P5,and Most of the indicators is better than that of foreign products technical indicators, which reach the acceptance factory standards, and agree to leave factory.