Aiming at the vibration of the boom tip of the concrete pump truck and considering that the dynamical characteristics of the boom system change with the variety of the boom positions， the active control strategy based on parameter identification in frequency-domain is adopted for the experimental study on vibration depression of the boom system. Firstly， the vibration signal of the boom tip is selected as the feedback variable and the actuator cylinder providing the force of active control is optimized. Also， the global model of the boom system under the active control is established. Then， the parameter identification of the global model is conducted based on the dual normalization method. Moreover， the expression of the optimal control variable is derived and the explicit condition of convergence is provided. Finally， the experimental for the active vibration depression of the pump truck boom is built， and the effect of the vibration depression concerning the control algorithm is verified according to the results of the test. The experimental results show that the vibration acceleration amplitude at the end of the boom obviously decreases about 59% by using the above algorithm， which verifies the feasibility and practicability of the method.