Abstract: It is study of residual stress measuring to super-strength steel by the method of Barkhausen Noise.Get the the demarcate curve from the relation about Barkhausen Noise and stress by the Cantilever stress loading experimentation,then half-rationing calculated the residual stress value by Demarcate curve.And the value measured will be contrasted to the values by the X-ray method.It is finded that the residual stress on parts surface or in can be measured deep by Brakhausen method,and can evaluate the residual stress to the machined parts.