In order to increase the range of vibration frequencies, a novel combination of the hydraulic vibration table and the electrodynamic shaker is proposed. The joint test system has been used in sine on random vibration test. The sine signals and random signals are provided by the hydraulic and electrodynamic shaker respectively, and the control algorithms are spectrum equalization and power spectral density (PSD) equalization. The variable spring-damp elements are set to simulate the transfer properties from the table to the electrodynamic shaker. Based on the simulation results by the MSC (Nastran) software, it is indicates that the dynamic characteristics of electrodynamic vibration shaker is closely related to the low frequency part of test article. The random and sine signals separated can use the control algorithm to continuously update the drive signals, and the control accuracy of the reproduced PSD at the control point is quite satisfactory.