A pump-fed liquid rocket engine (LRE) is used as an object of study in this paper. By applying the stochastic simulation method, test data are used to verify the mathematical model of static characteristics of LRE. Not only are the actual measurement error range of the external interfering factors and the actual variation range of the internal interfering factors considered, but also the actual measurement error range of the engine parameters is considered during the model verification. The results of the model verification show that the mathematical model of static characteristics of LRE is accurate and the calculation methods employed are proper.