Abstract: The nuclear safety regulations in China are lack of verification and validation (V&V) of the safety analysis codes. The standards and regulations used in verification and validation of codes for nuclear security at home and abroad were described. Combined with the major special project, the necessity of verification and validation of nuclear safety codes were discussed. Meanwhile, the problems which should be paid attention to were also discussed, including the testing scope of nuclear safety review department in the process of test, and how to divide the V&V analysis safety program.