对Nadcap （National Aerospace and Defense Contractors Accreditation Program）进行了介绍，并对材料测试实验室认证工作的关键要点进行了解释。从体系、人员、设备、方法、整改等多个方面剖析了Nadcap，指出了在评审中容易出现的问题，并提出了相应的建议，以帮助初审实验室筹备Nadcap材料测试实验室的认证。

Nadcap (National Aerospace and Defense Contractors Accreditation Program) was introduced, and the key points of materials testing laboratory accreditation were explained. Nadcap was analyzed in terms of system, people, equipment, method and corrective action, pointed out the problems that may easily accur during auditing, and put forward corresponding suggestions. Which may help preliminary laboratory prepare for the certification of Nadcap materials testing laboratory.