Aiming at the model verification and application requirements of virtual and real integrated0020experiments, carried out the credibility quantitative evaluation of simulation models. Based on the simulation data and limited test data, the corresponding accuracy evaluation method is proposed according to the data characteristics and types of key indicators output by the simulation model. Considering the influence of various uncertainties on the simulation test results in the simulation model, an uncertainty evaluation method based on experimental design and analysis was established. On this basis, the quantitative evaluation results of model accuracy and model-uncertainty are aggregated in the form of two-dimensional coordinates to represent the confidence of the simulation model. Finally, the application verification of the credible quantitative evaluative of the simulation model of a missile power subsystem is carried out. The credible quantitative evaluation method proposed in this paper can provide effective technical support for the design and evaluation of virtual and real integrated experiments in complex systems.