In order to achieve the multi-vibration source surface acousto-optical effect,two vibration sources were used to generate two low-frequency surface wave on the liquid surface at the same time,and also the clear,stable,high contrast acousto-optic diffraction fringes were observed.When the two surface waves′ frequency with multiple relations,the spot positions of diffraction pattern are same as the smaller frequency alone and are part of same the larger frequency alone.The diffraction fringes of single vibration source,and the interference fringes of double vibration source were observed when they don′t have multiple relations.It was derived that the analytical expressions between multi source diffraction field and the wavelength of surface waves or and amplitude.The theoretical analysis agree well with experimental results.