Abstract: Spheroidal graphite cast iron is used widely in wind power now, the nondestructive testing for this material mainly to use magnetic particle testing and ultrasonic testing. Foreign wind power companies have strict testing procedures for spheroidal graphite cast iron. With the increasing demand for product quality in China, the nondestructive testing standard for spheroidal graphite cast iron in wind power will be released soon. This paper firstly explains the characteristic of ultrasonic testing for spheroidal graphite cast iron, then introduces the ultrasonic testing procedure of foreign wind power company, and finally some typical ultrasonic testing methods for wind power spheroidal graphite cast iron are recommended.