Abstract: With consideration of shear effect and damping, the dynamic load impact of bimodulous beam is calculated based on the linear vibration theory. The vibration differential equation for the dynamic load problem of the bimodulous beam is established. The expressions of the dynamic displacement, the dynamic load factor and the impact time in the dynamic load problem of the bimodulous beam are derived. And the influence of the shear effect and the damping on the dynamic load impact of the bimodulous beam is analyzed. The computational results indicate that the influence of the shear effect and the damping on the dynamic load impact of the bimodulous beam can not be ignored in some cases.