Subsea production system has been widely used in offshore oil development in China. It usually uses composite electro-hydraulic method to remotely control subsea equipment. The control line uses super duplex stainless steel material， but this material has the risk of cracking caused by hydrogen in the subsea cathodic protection system. According to the corresponding foreign norms， the evaluation process of HISC of subsea super duplex stainless steel component was established， the finite element evaluation technology was elaborated. The modeling method， the method of result extraction， and the result checking were given. The calculation and analysis were combined with the practical project examples. Also， the applicable environmental parameters and hydrogen induced cracking test of evaluation technology are studied and elaborated.