This paper presents, a new method for vibration modal parameter identification using experimental technique of multiple-point random exicitation. The method is defined as the combined frequency response function method (CFRFM) in this paper. Theoretical model and computational formulae are developed and examined by actual engineering examples. The method can be efficiently used to experimental modal-analysis of large and complex structures. It has the advantages for simplicity, convenience and high-accuracy. The method can analytically separate c1osely-spaced modes in a certain extent.