The utility model discloses a mathematical model testing tool, and relates to the technical field of mathematical model simulation testing. The mathematical model testing tool comprises a sensitivityanalysis module which is used for analyzing and judging the effectiveness of a model by investigating the influence condition of the change of a group of sensitivity coefficients in the mathematical model on the output of the mathematical model; a frequency spectrum analysis module which is used for analyzing the statistical characteristics in the frequency domain of the mathematical model by adopting a stationary random process algorithm and a generalized stationary random process algorithm; and an uncertainty analysis module which is used for evaluating the influence degree of the uncertainty of the simulation input parameters on the system output so as to judge whether the failure caused by the input uncertainty occurs or not and calculate the failure probability. A mathematical model checking tool is provided, so that the establishment and management of model data are realized; and through sensitivity analysis, spectrum analysis and uncertainty analysis, based on statistical inference of spectrum analysis, verifying and confirming the simulation mathematical model of the complex system layer by layer, thereby forming a verified and confirmed high-precision model.