Abstract: Simulation concrete is a common material in dynamic model test. Accurate determination of its dynamic Young’s modulus is of great significance to model design and numerical analysis. In previous studies,the cantilever beam method is usually used to measure the dynamic Young’s modulus of simulation concrete,but this method is not supported by any standard,and its accuracy and applicability need further discussion. Based on the traditional measurement method,the correction of the classical beam model and the influence of the incomplete fixed support effect caused by the base deformation are considered. Taking the dynamic Young’s modulus measured by the free-free beam method in the standard as the reference value,the applicability of the cantilever beam method to measure the dynamic Young’s modulus of simulation concrete is analyzed. The results show that there are still some differences between the experimental results and the results of theoretical and numerical analysis. The first-order resonance frequency measured in the test is lower than that of the numerical analysis,and the difference decreases with the increase of the lengthheight ratio or slenderness ratio. The resonance frequencies of order 2 and 3 are higher than the numerical analysis results. The results show that in order to accurately determine the dynamic Young’s modulus of simulation concrete by cantilever beam method,the length-height ratio of the specimen is at least 7（ with the slenderness ratio of 24. 2）.