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.