With the emergence of simulation applications such as digital parallel battlefields， equipment digital twins， and digital-real fusion tests， based on a comprehensive analysis of the development trends of modern military simulation technologies and systems， this paper focused on the main characteristics of the LVC（live virtual construstion）-based digital-real integrated parallel simulation system and the new problems emerging in its credibility evaluation. Moreover， it proposed a corresponding credibility evaluation framework to help enhance the credibility of complex simulation systems in fields such as military training and military exercises.

To improve the anti-interference test capability of missiles in complex electromagnetic environments， this paper proposed a Bayesian regularization design method for test samples of multi-sensitive factor anti-suppression interference. First， this method analyzed the typical multi-sensitive factors affecting the anti-suppression interference capability of the seeker and then designed a Bayesian regularization network to solve the test sample design problem of missile anti-interference. The constructed Bayesian regularization network for multi-sensitive factor anti-suppression interference tests could establish a nonlinear mapping relationship between different multi-sensitive anti-interference influencing factors and anti-interference capability， greatly reducing the sample size of traditional all-factor traversal tests. Then， the hyperparameter solving method for the constructed network was studied， thereby realizing the Bayesian regularization design method for test samples. Finally， simulation experiments on typical anti-suppression interference were conducted to verify the performance of the proposed test sample design method. The results indicate that the Bayesian regularization test sample design for multi-sensitive factor anti-suppression interference effectively shortens the time cycle， saves test resources， and provides theoretical support for the anti-interference test evaluation of precision-guided missiles.